The Best Book for 2 Under 2 – A Review of “That’s MY Cake!” by Wonderbly

"That's MY Cake" Wonderbly personalized children's book for siblings

Most little ones struggle with sharing—it’s just part of growing up.

And if you’ve got (or are about to have) two kids under two, you probably already know that sharing can be a bit of a challenge in those early years.

The constant snack stealing, the toy snatching, you name it.

When you’re raising two kiddos so close in age, everything is a competition. That’s why when I discovered a book that covered the ever-challenging topic of “sharing”, I knew it was going to change the game.


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That’s MY Cake! by Wonderbly is one of those rare finds that helps toddlers understand sharing in a fun and engaging way.

Sometimes a cute, exciting book can be just what you need to really engrain a new concept into a young child’s brain.

This personalized book makes storytime an exciting and meaningful experience, especially for families navigating sibling relationships.

Let’s take a closer look at why this is one of the best books for 2 under 2 and how you can personalize it to make it extra special for your sweet kiddos!


two children, 2 under 2, reading "That's MY Cake" Wonderbly personalized book for siblings

Why “That’s MY Cake!” Is the Best Book for 2 Under 2

If you’ve been around kids before, you know that sharing can be a hot topic for some. I know my oldest daughter was not a fan of her sister playing with ANY of her toys at first. With them both being under two, it was a difficult topic to cover solely for the fact that they’re both so young. We needed something that captured their attention AND had a hidden lesson to go with.

Thankfully, Wonderbly has created a book that not only captures toddlers’ attention but also teaches an important lesson about sharing – a true hero, honestly.

The story follows siblings as they face the ultimate dilemma: who gets the last slice of cake? The lighthearted and humorous approach helps young children see the value of cooperation rather than conflict (Yay!)

For parents of two under two, this book is a valuable tool. Toddlers are still learning social skills, and books that reinforce positive interactions can help reduce daily struggles over toys, food, and attention.

Here’s why “That’s MY Cake!” stands out as one of the best books for siblings under two:

  • Personalization makes it engaging – Kids love seeing their names and faces in a book, keeping them more interested in the story.
  • Encourages positive sibling interaction – Helps toddlers understand sharing without forcing the concept on them.
  • Durable for toddler hands – High-quality pages withstand enthusiastic page-turning and sticky fingers.
  • A bedtime favorite – Because it’s personalized, kids love hearing this story again and again.

"That's MY Cake" Wdonerbly personalized childrens book. Best book for teaching sharing.

The Personalization Process – How to Create the Perfect Book for Your 2 Under 2

One of the best things about “That’s MY Cake!” (and almost all of Wonderbly’s books) is how deeply customizable it is. When ordering, you’ll go through a fun and easy process to make the book unique to your child. Here’s how I was guided through the process:

1. Enter Your Children’s Names

You start by adding the names of up to four children who will be featured in the book. If you have twins or more than two young children, everyone can be included, making it perfect for families with multiple kids.

2. Choose Their Characters

Most Wonderbly stories offer a variety of characters with different hair types, skin tones, and other customizable features, allowing you to create a main character that closely resembles your child. This level of personalization makes the book feel truly special—your little one isn’t just hearing a story; they’re seeing themselves in it! When kids recognize themselves in a book, it draws them in even more, making storytime feel magical and helping them connect with the characters on a whole new level. Ultimately, helping with connecting the story to real-life situations, which is definitely the goal here.

3. Select a Cover Color

To make the book even more special, you can choose from a selection of cover colors. Whether you prefer bright and bold or something more neutral, this option lets you tailor the book to your child’s personality or nursery theme.

We chose “Vanilla Sundae” for the cover of our book, if you’re wondering what color is in the photos!

4. Write a Special Dedication

Personalized books from Wonderbly include a dedication page where you can add a heartfelt message to your child. Whether it’s a simple “We love you!” or a longer note about the joy of sibling love, this feature makes the book extra meaningful.

5. Personalized Facts and Statistics

One very cool (optional) feature is the ability to input your children’s birth dates, so they can see cool statistics related to their age differences in the story!

6. Preview the Entire Book Before Purchasing

One of the best parts of the Wonderbly experience is that you can preview the entire book before you buy it. This means you’ll see exactly how your child’s name, character choices, and customizations appear in the story before committing to the purchase. There are no surprises—just a beautifully crafted book that’s made just for your family. This feature ensures you’re 100% happy with the final product before it arrives at your door.


How “That’s MY Cake!” Helps Toddlers Understand Sharing

Toddlers don’t instinctively understand the concept of sharing—it’s something they learn over time. “That’s MY Cake!” presents sharing in a way that is easy for young children to grasp. Instead of just telling them to share, the story shows a fun scenario where the characters must work together to enjoy the last slice of cake.

This makes it an effective teaching tool for parents struggling with daily battles over toys, snacks, and space. Rather than using discipline alone to encourage sharing, this book allows toddlers to see sharing in action and understand its benefits through storytelling.

We all know that it’s difficult to get children to comply with rules, but putting them in story form gives them a sort of role model to mimic, which definitely makes things easier.


2 under 2 reading "That's MY Cake" Wonderbly personalized book for kids. Baby and Toddler

Parent Reviews – Why Moms and Dads Love “That’s MY Cake!”

I am always curious to see what other people have to say about things before I make a purchase, so here’s my summary of what other parents are saying about this book!

Parents of young children, particularly those with toddlers aged 1-4 years old, love how this book captivates their little ones.

Many reviewers mention that their children request it every night, making it an instant favorite. This is actually something I’ve noticed happens with all the Wonderbly books in my house at one point or another! Definitely can vouch for those reviews.

One mom of two under two noted that the personalization aspect made both of her toddlers feel special and included, helping to ease some sibling rivalry.

Another parent loved how the book became a tool to talk about sharing without turning it into a lecture. I’ve learned that younger siblings typically don’t absorb the details of lectures in general, so books have been a great alternative to teaching and explaining complex issues!

Families also appreciate the durable pages that hold up to toddler enthusiasm and messy fingers!

Overall, parents rave about the high-quality design, meaningful message, and how much their kids love seeing themselves in the story. This is all true for my toddler as well!


Where to Buy “That’s MY Cake!”

If you’re looking for the best books for 2 under 2 that actually keep toddlers engaged while teaching them valuable social skills, “That’s MY Cake!” is a must-have. My girls have absolutely eaten this up – pun absolutely intended.

You can personalize and order your copy today at Wonderbly.com. This is my affiliate link, so I will receive a commission if you choose to purchase; however, I only recommend products that I (and my family) truly use and love, so you’re in good hands!

Personalized books create lasting memories, and “That’s MY Cake!” is the perfect addition to any toddler’s bookshelf. Plus, anything that helps minimize fights over snacks is a win for parents everywhere!


If you’re interested in reading more about tips and tricks surrounding having 2 kids under 2, check these out next!


Realistic Tips on How To Survive Life with Two Under Two
2 Under 2 Must-Have List
The Ultimate 2 Under 2 FAQ: Everything You Need to Know
How To Do Nap Time with 2 Under 2
The 14-Month Age Gap: The Reality of Two Under Two
How To Do Nap Time with 2 Under 2: The Early Days
A 14 Month Age Gap: How To Navigate The First Few Days of 2 Under 2

With Magic, Gabby
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