The set of book is composed of 11 books, from number 0 to 10.
 
These books are designed to make the first lesson of math, the concept of number, fun and easy to grasp for children age 3-7.  Since mathematics is a very conceptual subject, story makes it more tangible and easier to understand for the young mind.

The stories can be read to kids as young as 3 years old.
The concept of numbers is repeatedly mentioned in the story along with fun plot.
 
Eash book ends with mathematic games and activities for children to review the numbers and build up the association between objects and numeric symbols.