"Kudos for putting together an academic-research background with an imaginative, playful presentation to try to help kids build a solid early math foundation.” - Common Sense Media

Help your preschooler develop early math skills with this science-backed game! Fuzzy Numbers provides a fairy-tale setting for children to practice foundational early math skills.

Your child will love exploring Princess Poodle’s castle, Prince Frog’s beanstalk, Witch Cat’s potion school, and Pirate Whale’s treasure cove. Each scene is designed to help your child exercise his or her intuitive sense of quantity, or “number sense”.

Research shows that children with a stronger number sense tend to perform better on real math tests (Halberda et al., 2008). Four and five year old children who played digital number sense games demonstrated better math performance (on tests of counting, number identification, addition, etc.) compared to control groups, when tested right after a brief practice (Wang et al., 2016) or after several weeks of practice (Park et al., 2016). Fuzzy Numbers is adaptive and continually challenges your child’s number sense. Children from ages 3 to 5 enjoy playing Fuzzy Numbers. Learn more about the science behind the game on the Cooney Center at Sesame Workshop blog:

Cognitive ToyBox is committed to developing science-backed games to support the early learning and cognitive development of children. Please contact us at with any questions or feedback.



Halberda, J., Mazzocco, M. M., & Feigenson, L. (2008). Individual differences in non-verbal number acuity correlate with maths achievement. Nature, 455(7213), 665-668.

Park, J., Bermudez, V., Roberts, R. C., & Brannon, E. M. (2016). Non-symbolic approximate arithmetic training improves math performance in preschoolers. Journal of Experimental Child Psychology, 152, 278-293.

Wang, J. J., Odic, D., Halberda, J., & Feigenson, L. (2016). Changing the precision of preschoolers’ approximate number system representations changes their symbolic math performance. Journal of Experimental Child Psychology, 147, 82-99.

What's New

Version 3.0

We introduced two new number sense activities. Check out the farm and train scenes!

Ratings and Reviews

5 out of 5

8 Ratings

8 Ratings

Great app for toddlers to learn maths, scientifically proven


I tend to be skeptical of learning apps since who knows if it will actually help your kid learn better. I did some research into this app before buying - there's a good scientific rationale behind it and there are studies backing the app too. Very happy I found this. Anything to help my little one learn faster!

My child loves this


My daughter had so much fun playing this game on our cross-country plane ride. I love that it is based on research and will be a fantastic help to her in kindergarten next year. Looking forward to more fun games that are based on educational research and can keep my daughter entertained for hours. Thanks

Great educational app


This engaging and fun game aims to
Increase a child's "numbers sense" by challenging them with increasingly difficult more-than and less-less than problems. Backed by real science, it holds my child's attention while building math skills. Great app.


Cognitive ToyBox, Inc.
253 MB
Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Cognitive ToyBox, Inc.


  • Family Sharing

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

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