• Before I had kids, I didn't put much thought or prep into my travel plans.
• A few encounters while abroad have made me change my ways now that I often have kids with me.
• I now travel with apostilled copies of their birth certificates and a letter from their father.

Before kids, I traveled the world alone with nothing more than a backpack and a worn guidebook. I rarely made plans in advance and enjoyed the spontaneity and surprises that were a part of globetrotting without much advance planning.

Once I started traveling with my children, that approach seemed irresponsible and, at times, downright dangerous. Now, I put a lot more care and thought into my trips before leaving home.

As someone who has taken my kids to 30 countries on six continents, I've found that a little advanced planning goes a long way. Here are the four steps I always take before traveling with my kids to help ensure that our trips go smoothly and that we all stay safe.

I always look up the emergency number for wherever we are.

Once, while driving in Canada with my kids, I got lost in a dark, industrial neighborhood at night. No one was around, and I started to feel uneasy, unsure if anyone was lurking in the shadows.

At home, I knew I could call 9-1-1 for assistance in an emergency. However, as my panic level started to rise, I realized I didn't know who to call for help in Canada. (I've since learned the number to dial is actually 9-1-1, but that's not the case for most other countries.)

Eventually, I found my way back to civilization, no worse for wear. However, now I always look up the emergency number to call when I land.

On a subsequent trip to Paris, an Uber began veering wildly off course. It turned out the driver had detoured due to construction, but I was glad I knew to dial 1-1-2 instead of 9-1-1 if I thought my kids were in danger.

I double-check that my health insurance covers us wherever we are going

When I was young and reckless, I assumed I would never get sick or injured, especially on a trip. In hindsight, I was remarkably lucky that I never caught more than a mild case of Montezuma's Revenge abroad.

After a health scare on a trip to Jamaica, I no longer take any chances. Midway through what was supposed to be a relaxing trip, my son developed a fever and started vomiting. The resort where we were staying called a doctor who suspected appendicitis. I panicked, wondering if our insurance would cover a pricey operation or medical evacuation.

Fortunately, my son recovered quickly with an antibiotic, but now I always double-check that our health insurance will cover us abroad, including to far-flung destinations like Antarctica. If not, I will look into buying travel insurance that will cover medical care and evacuation. Before travel, I also check that my children have all the recommended vaccines for our trip.

I always pack my children's birth certificates

My first trip abroad after becoming a mother was to a destination wedding in the Caribbean. I was allowed in easily with my infant son strapped to my chest. However, leaving was not so easy. When trying to return home, a border guard questioned me extensively, asking for proof that I was the baby's mother. I managed to convince the agent that I was indeed my son's mother, but the situation rattled me.

To avoid a similar issue, I now carry official copies of my children's birth certificates when we travel abroad. For good measure, I had the documents apostilled by the Secretary of State for Washington, DC, where they were born. An apostille is a type of verification similar to notarization, but it is recognized in more than 125 countries worldwide, making it a better choice for international travel.

Although this may seem like overkill, I have been asked for proof that my children are mine twice, once when entering the United States and once when entering the U.K. Although I likely could have proven my children are mine without these documents, I don't want to take any chances, and having them on hand made the process much easier and faster.

I get a notarized letter from my children's father stating that I have permission to travel with them

Although my husband and I are happily married, his demanding work schedule often leaves me traveling solo with our kids. On several occasions, immigration officials have asked me for proof that I had my husband's permission to take my children abroad.

Once, I was asked for the same documentation when returning to the United States. Now, I always carry a notarized letter of consent signed by my husband. I use a free template I found online and update it with the specific dates and location for every trip, then I take it to my bank to have it notarized for free before we go.

Although carrying additional documents can be a pain, I remind myself that additional paperwork is for my children's protection because it helps combat child trafficking and kidnapping.

• Every spring break, I travel with five of my friends and our kids for a quick getaway.
• This year, we rented a huge cabin in Branson, Missouri, and had a great time.
• The kids don't always get along, but we solve issues quickly, and split costs and chores.

Every spring break, I travel with my two sons, five college friends, and all their kids for a short getaway. This year, we rented a cabin near Branson, Missouri, for three days and nights of sleepovers, swimming, and hitting the parks. In total, six moms and 16 kids, ranging from 3 months to 11 years, attended.

The kids enjoy their time together, and so do the moms

It's such a special experience. The age gaps among the kids foster special friendships and mentor-like relationships. And because we're all together for an extended amount of time, the moms also get to know each child better. It's sort of an all-moms-on-deck situation, and kids simply look to the nearest mom to ask for something. It's a situation of instant closeness and confidence, and it creates incredible bonds with kids I don't get to see often enough.

Then, once the kids go to bed, the moms stay up talking, having a few beers or glasses of wine, and playing cards. One night, we hooked an old drive to the TV and swiped through 15-year-old pictures while laughing hysterically.

We all live between 20 minutes and 3 hours apart, but Kansas, where we live, has a statewide spring break, so despite covering six school districts, we're all off the same dates.

We started doing it to make it easier to see each other

It started four years ago, when one of my friends began planning to spend spring break visiting all our homes. She was scheduling play dates and sleepovers at multiple stops. However, it turned out to be a challenge, and there were too many changes to the itinerary to make it all run smoothly. She ended up cutting the trip short after two stops. The next year, she thought we should all go someplace neutral. We'd all book a place together.

This year, we found a cabin with seven king-sized beds, a bunk room, and 6.5 bathrooms. It also came with a huge kitchen, two large dining tables (one was used strictly for crafts), a movie theater, and a game room.

We split costs, as well as tasks like cooking and cleaning

We all work in middle management and midlevel careers, so we're also in a midlevel budget. This was our most expensive trip, at around $150 per night per family for the accommodations. For food, we order in groceries — pizza, chicken nuggets, tons of snacks — nothing gourmet, we know the audience. We plan the menu together, then split six ways and Venmo. This year, we spent around $500 on food, with plenty to take home after all was said and done. In total, each mom spent just over $530, plus gas.

While we were there, we had plenty of fun by swimming or heading to the park. We also brought games from home and did activities like crafts, bracelet-making, and coloring. Some kids are allotted screen time, and others aren't, though we did have a movie night with popcorn.

As for cooking and cleaning, it's a house full of working moms: things are done in almost no time because everyone chips in. It's actually easier than at home because there are way more hands doing the job. One evening, my husband called, and after a 10-minute phone call, I returned to find dinner put away with a spotless kitchen and living area.

The kids get along — for the most part

Logistically, it works like this: the mom closest by is in charge. Though we vary slightly in parenting styles, our similarities make this possible in the first place. We spoke in advance about how we get along and what we allow. (A real text exchange outlined rules for fart jokes.)

The kids absolutely fight — it's three days in a shared space. They didn't want to take turns playing games, couldn't agree on a movie, and there may have been a joke or two made that someone else took personally. Normal kid stuff. However, there are enough activities and enough kids to play with that they were easily redirected. Besides, learning to get along is a life skill.

Meanwhile, it's fun to see which ages and personalities flock together, and not always the ones you expect. They find shared hobbies and interests while creating close-knit friendships with kids they otherwise rarely get to see. All while I get quality time with my friends. It's an experience I can't praise enough, and I'm thankful it's one we get to continue.

• Pokémon cards have become valuable assets on the playground and in cafeterias.
• Preteen collectors aren't playing around: They view the cards as investments and a tool to build value.
• I caught up with kids at a recent trading event. Here's what I learned.

My introduction to Pokémon was the cartoon, which premiered in the US when I was five. My brother watched and built a small collection of cards, only for them to be stolen, marking the end of his short-lived hobby.

I hadn't really thought much about the pocket-sized monsters since then, aside from when Pokémon Go became an inescapable phenomenon in 2016.

Then, a few months ago, a couple of my colleagues with elementary school-aged kids said Pokémon was back, but it wasn't the game they remembered.

Thanks to the internet and smartphones, today's kids treat their Pokémon collections like stock portfolios. Kids bragged, some inaccurately, about million-dollar cards, and parents coached their youngsters on how to make the best trades.

I decided to see for myself and headed to the hottest club in New York for the under-16 set: Bleecker Trading.

The financial center

On a Thursday during spring break, the hobby shop on the Upper West Side was welcoming, with boxes of free pizza stacked near the door and a Pikachu balloon signaling that it was open for business.

Business, indeed. During my afternoon at the Bleecker Trading, I watched as dozens of kids wheeled and dealed, spewed financial jargon — like appreciation and interest — that I didn't learn until I was twice their age, and negotiated with adults.

Last year, Pokémon was the world's No. 1 toy product by sales — though perhaps it should be thought of more as a commodity and less as a plaything. Over the past year, Pokémon cards have outperformed both the Dow and the S&P 500, according to Card Ladder's Pokémon index, which tracks market performance on several resale platforms.

Edi, a nine-year-old from Switzerland, was visiting his dad in New York and had begged to visit Bleecker Trading. When I walked in, he was in the middle of shaking hands with the shop owner, Matt Winkelried, to mark a successful deal.

Edi understands how valuable cards can be.

"The best card costs more than a house," he told me.

He's not wrong. In February, a rare Pikachu sold for $16.5 million, setting a record. Edi's own top card cost about $300 or $400, his dad said.

In a back corner, three teenagers were in the middle of a trade. One said he was happy to make a cash deal. Another said, with a bit of jealousy, that the other's grandma always buys him good cards.

They were emphatic about the reason they collect: the money.

They seemed a bit bemused by my amazement. Duh, they understood the basics of investing and how to read stock-like charts that track the values of specific cards.

They prided themselves on trading fairly and following the rules (including sanitizing their hands before engaging, as demonstrated by Bleecker Trading staff). In fact, they seemed downright responsible with their money.

A couple of tables over, RJ and Jasper, who were there with their dads, told me about how they keep some packs and boxes of cards unopened — a strategy Winkelried likened to a low-risk investment like bonds.

It's tempting to rip through them, RJ said, so he keeps them under his bed in a bag. Out of sight, out of mind.

I asked what he was saving for. "A rainy day," Jasper, who keeps track of the interest on various cards, told me.

The kids, it turns out, may be all right.

• Michaeleen Doucleff, author of "Dopamine Kids," wanted to wean her daughter off screens.
• She said the key was to replace screens with activities that genuinely motivated and excited her daughter.
• She also cut back on buying ultra-processed foods by having her daughter bake cookies from scratch.

This as-told-to essay is based on a conversation with Michaeleen Doucleff, the author of "Hunt, Gather, Parent" and "Dopamine Kids," released on March 3. This story has been edited for length and clarity.

Around the time my daughter, Rosy, was 4, we went to the beach. It was a really beautiful, sunny day, and I realized I couldn't enjoy it. She was having a great time building a sandcastle; I was sitting there checking my email, texts, and social media.

I felt this little hum of anxiety. Was she going to grow up without me being able to enjoy our lives together?

I started examining my own relationship to dopamine, the brain systems involved in reward and motivation, whether it is related to screens or ultra-processed foods. I realized that for me, these products were reclaiming the pleasure in our lives.

My life started to change when I set limits on screen time and processed snacks, swapping them for other activities and whole foods.

Then I wanted to help Rosy, who was 8 at the time.

I learned that a lot of the advice out there didn't work for me because it was based on research from 20 to 40 years ago. I kept trying things that I would read in parenting books, like "let children be bored." If I told Rosy to go to her room and play without screens, I'd just create a struggle. She'd crave screen time even more.

The truth is, parents are up against a lot. Apps, games, and ultra-processed foods are designed to keep us coming back. Research suggests that if parents don't have a clear mission for their families, it's much harder to keep impulses under control.

Luckily, research also suggests ways to change your child's relationship with screens. Here's how I got my daughter to swap them for activities that she enjoys.

I made a 'family dream list' to guide us

The first step is about taking back the wheel. That came with deciding what I wanted for my family. What was my dream?

Exploration is a fundamental need for my child, and I didn't want her to fulfill it with video games and social media. Instead, I wanted Rosy to enjoy being outside with her friends and going on adventures.

So one day, I said, "I'm going to teach you to do something you've been dying to do," which was riding a bike by herself to the market. We spent a few nights biking around everywhere until she felt comfortable on her own. Instead of watching YouTube videos of cartoon characters biking around, she could now do it herself.

Now that she's 10, biking is one of Rosy's favorite activities. She bikes to piano lessons and soccer practice. Sometimes, on Saturdays, she'll spend six hours biking with her friends, then come home exhausted and happy.

Leaning into her natural motivation

Dopamine plays a key role in motivation; it makes us seek out things that feel rewarding. To compete with screens, it helps to ride the motivational wave.

Once, we were in the cookie aisle of the grocery store. Rosy started begging for cookies because foods like that light up the brain's reward system. Instead of saying no to the cookies, I wanted to cultivate her desire to create a new habit.

I said, "OK, you can have the cookies, but you're going to bake the cookies all by yourself." I'd help her get started, and she learned how to use the mixer and oven.

When she finished baking the cookies, she ate only one or two. She wanted to save the rest because they were so precious to her. To this day, she's an amazing baker. A couple of months ago, she made a whole lasagna for dinner.

It turned out to be a great swap we made, both for cutting down on store-bought snacks and on screen time.

Micro-celebrations kept her going

The internet uses micro-celebrations: The little "ding" when you send a message, the hearts, the emojis. They seem very simple, and like they're not doing anything, but they're triggering a tiny bit of pleasure in our brains. It's the superglue that keeps us attached.

As a parent, I wanted to give Rosy similar micro-celebrations. When Rosy and I were first starting to bike around the neighborhood, every now and then I'd say, "Wow, this is really fun. I love this. This feels so good." It's just about sprinkling in a little bit of excitement.

Another really powerful micro-celebration parents can use is having the kid present what they made to you, whether it's a drawing or a craft. It creates an emotional payoff for the child, making them feel like they've done something important. It'll make them want to keep doing it more and more.

I set a price for screen time

Products like TVs and tablets are what I call "dopamine magnets"; they're incredibly hard to resist. We can't rely on willpower alone. Instead, we need very clear, simple rules that never change.

Almost every Saturday afternoon, Rosy would ask to watch a movie. Finally, I agreed, but with one new rule: She had to write a two-page summary of the last movie she watched, and present it to me.

At first, I was blown away. She ran to go do it — she was really willing to work to get this movie. Still, after a few times, she stopped asking for Saturday movies. She decided they weren't worth the price.

By then, we had other activities to replace the movie. On top of riding her bike, she was making a lot of crafts — embroidering, crocheting, and paper quilling.

Creating screen-free environments

What many people don't realize is that the pull happens before you use the device. Usually, there's some cue in your environment, such as the sight of your phone or the places you typically use it.

For example, a child might associate getting into the car with playing games on a tablet. Instead, you can change that to another activity. We bought a CD player for Rosy so she could listen to audiobooks on drives. It forces her to wait and listen to the book again, instead of us immediately buying a new one.

Without changing cues, parents may have to fight to pull their kids off screens or to police what they eat.

By using these behavioral principles, you can set up routines that help kids rely less on willpower alone. Over time, those pathways stick.

• My oldest got her first job, and I quickly realized I needed to teach her about managing money.
• She's learning how to budget, save, and splurge from time to time.
• She now pays for her own drinks at coffee shops and I charge her for rides to and from work.

I was absolutely thrilled when my oldest child got her first retail job. Within a few weeks of starting, she was sometimes working 20 or more hours a week, bringing home a solid paycheck at just 17.

However, I quickly realized how little I'd taught her about money management. Judging by the number of Amazon packages arriving on our porch, addressed to my daughter, I knew we still have a lot of work to do, but I wanted to be careful in the way I guided her.

We tried to talk about money early

When our four kids were young, we used a jar system for their allowances. They would divide their singles and fives among the jars, which included one for savings. Then, they would place their spending money in their wallets. This system was simple and it worked for a time. When they received money for their birthdays or Christmas, we would deposit those funds into their savings accounts to instill the idea of saving for future expenses or for a rainy day.

I guess time got away from me. In the blink of an eye, my sweet elementary school girl who spent her days creating art and dancing is now approaching high school graduation. With her sudden and bountiful-for-her-age income, it was time for a crash course in budgeting.

We had to decide how we would handle her new income

My husband and I suddenly had so many decisions to make. What should our daughter's financial responsibilities be at this age? Which essentials and wants should we continue to pay for? How much should she place in her savings account versus how much of her check should she be able to freely spend?

I decided that I wanted my daughter to learn through trial and error, with support.

There were times I cringed when I saw another Amazon order arrive on our doorstep, the package addressed to my daughter, or I knew she'd decided to get Starbucks for herself and treat her friend who wasn't working. But, isn't it ok to enjoy the fruits of her labor? I felt as if I were in one of those old school cartoons, an angel on one shoulder and a devil on the other. As a parent, I wasn't sure what I was supposed to be teaching her.

She's learning that money flow is dynamic

She's been at her job for almost six months now. Her hours wane and increase based on the store's busy and slow seasons. She's had large paychecks, as well as paychecks for only a few hours of work. Learning to adjust with every pay cycle has been challenging. As a parent, I know my job isn't to fix my child's feelings that naturally come with every challenge. Rather, my job is to hold space for frustration and encourage her to process and problem-solve.

What I've found is that there is no end-all, be-all guidebook to teaching our kids about money. Every family dynamic and financial situation is different and ever-changing. I personally value having healthy food at home over eating out, I like buying quality clothing at a deep discount, and I am not one to do much extra for myself, like get my nails done. My values, however, don't have to be my child's — not now or even in the future.

Instead, I want her to have basic financial competency and confidence. I also want her to understand the value of a dollar, which is why she now has to pay some of her own expenses, such as any eating out at coffee shop, as well as her favorite press-on nails, or (yet another) stainless steel water bottle that she just has to have. We also charge her $10 (much less than an Uber would cost) for a roundtrip ride to and from work, preparing her for putting gas in her own vehicle in the near future.

She has opted to save around 75% of each paycheck, no matter how many hours she worked that week. That was her choice, and her father and I are pleased with it. She is slowly learning to spend wisely, to pause and ask herself, "Do I really want this beyond just this moment?" She is truly living and learning — and so are we.

• British billionaire John Caudwell has eight children, ranging in age from 2 to 47.
• From flying coach to wearing Zara, he's intent on raising grounded and hardworking kids.
• Here's Caudwell's approach to parenting — and his biggest piece of advice.

This as-told-to essay is based on a conversation with John Caudwell, the British billionaire founder of mobile phone businesses Phones 4u and Singlepoint, both of which he sold. Caudwell is raising three children with his partner, former Olympian Modesta Vžesniauskaitė, and now focuses on his childrens' charities and real estate investing. The following has been edited for length and clarity.

My family life is very dynamic. I have eight children, one of whom I'm the stepfather to. My youngest kids are 2 and 5 years old, and my oldest is 47.

I grew up in a little terraced house in the middle of Stoke-on-Trent, and I had next to nothing. I don't want my kids to have next to nothing, but I don't want to overcorrect the way that some rich people do.

For my older kids, when I was building my businesses, there was less time on a day-to-day basis, but it was quality time. I've always made quality time an absolute priority: almost never missing a sports day or prize-giving, things that were important.

Now, we do most of the parenting and don't have nannies. I have two housekeepers who help out, but school is the real answer, from 9 a.m. until 4 p.m. That gives them discipline, entertainment, interest, and education.

Flying economy and shopping at Primark

Everybody wants to be spoiled, but it's very important that we keep our kids' feet on the ground, so we are very controlled about how we approach luxury.

For instance, when we go on the superyacht for a family holiday, that's mainly a treat for me. The adult children have to make their own way to the boat. The younger ones travel in economy with Modesta — I'll take business class most of the time — and we take the budget airline easyJet. We have to demonstrate to them what normal life is like.

They have virtually no designer clothes — maybe some that they got as presents, but we buy them clothes from Zara and Primark. If you go to Gucci and pay a thousand pounds, are the kids any happier? No, they're not. Do they end up having a very spoiled attitude? Yeah, they probably do.

When we take them to a restaurant, they'll have chicken nuggets and chips, and the younger ones share a plate. I hate wasting food. I always remember, when one of my daughters was young, we went to a restaurant, and she asked, "Daddy, would you really mind on this occasion if I had steak and chips?" You see kids out there just ordering lobster, and my kids would never dream of it.

When it comes to spoiling, one early mistake we made was buying them too much at Christmas. Not expensive gifts, but too many of them. They'd scramble through all the boxes and end up playing with a cardboard box. Now, we take a much more frugal approach; two or three Christmas presents are more than enough.

Our financial support is a very frugal help line that encourages them to achieve their own success. It supports them while they're in school so they can focus on being good students. It doesn't pay for them to go out to nightclubs or have expensive meals. My support is very much related to the effort they put into their lives.

My adult children are all busy making their own careers. One of my daughters is a psychotherapist, one works in real estate, and another works at a bank. One of my sons is a musician, writing and producing songs, and another is getting his real estate license.

The golden rule

The one thing I always do is that no matter what happens in your child's life, you're constantly telling them you love them.

No matter how much I have to punish them, it's always followed by, "Well, of course, I love you, darling. I love you very much, but I have to discipline you because you have to grow up to be meaningful, good people."

That's been consistent: I don't really want anything from them in life other than for them to be happy and leave the world a better place than they found it.

What does it matter if they're rich, if they're unhappy? What does it matter if they're an Olympian, if they're unhappy?

If every kid could grow up to aspire to those goals, which of course is very difficult to achieve, what a wonderful life for our children, but also what a wonderful place for the world to be.