Gimble the Happy Tree Frog is an interactive math story book that develops kids interest in math. It features:
1. Story with cute characters and beautiful watercolor art
2. Narration with word highlighting and fun voices for each character
3. Integrated math problems to solve and animations to discover

Kids ask “Why do I need to learn math?” This fun and engaging interactive math story book shows kids how to use math in a real world scenario that they can relate to; a pizza party!

Gimble the Happy Tree Frog finds his friend Franco the Fox sad. Gimble decides to cheer Franco up by throwing him a surprise pizza party. He invites all of Franco's friends. Using tally marks Gimble figures out how many guests will be coming to the party. Then Gimble visits Pete the town pizza wizard, to order the pizza. This chapter of the story has engaging, interactive math activities that show kids how you use math when ordering pizza for a party.

Math story problems:
- Using tally marks to count
- Slicing pizza into 4 equal parts to get ¼
- Counting using a number line
- Adding quarters into whole numbers
- 3 tens (introduction to the concept this is the same as 3 x 10 )
- 3 groups of 2 (introduction to the concept this is the same as 3 x 2)
- Addition and estimation problems

For kids enjoyment:
* A nice, warmhearted story about friends helping out friends
* Beautiful watercolor art makes it feel like a traditional story book
* Page turning feels like a page turning in a paper book
* Word highlighting with voice over
* Professional voice over artist, creates fun characters
* A child can read on their own or click the text to have it read to them
* Find hidden animations to collect items for an even more engaging experience
* Complete interactive math activities as part of the book to collect items
* Intuitive interactive content that kids enjoy playing
* Through parental controls reset the app to play again.

To protect the kids:
- No Ads and No in-app purchases.
- All external links secured behind a parental gate.
- See privacy policy at

What’s New

Version 1.1

Minor usability fixes.

Ratings and Reviews

5.0 out of 5
5 Ratings

5 Ratings

kathleen tuite ,

Cute, polished, great story!

I played this with my 3yo as one of her first interactive apps. I don’t usually get apps for her, but I really wanted to try this one. While the math was certainly above her level, she was still able to use it and especially loved putting toppings on the pizza and the scenes in the last chapter. It was a great story, beautiful pictures, and overall very polished and well-designed!

Ilana in Santa Monica ,

Wonderful storybook!

This is a beautiful app for children ages 3-8. My daughter is 9, and enjoyed it as well.
The illustrations in pen and watercolor are gorgeous. The story is cute, with a choice to listen or read. The voiceovers are animated and fun to listen to!
I love the integration of practical, cool math skill! Check it out!!!!

DavidJacie ,

Superb! Please make more!

My kindergartner adores this app. If you have others, please let me know. Fun, educational, a good use of time, conversational, and excellent teaching tool for basic math and reading.

App Privacy

The developer, Happy Little Rain Cloud, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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