The characters in each of these ten books explore the world of numbers. They encounter beginning math concepts such as counting, adding and subtracting. Each book encourages active participation in the story and includes simple math-related activities so children can reinforce the concepts they have learned.

My Five Book - Little Five lives in a number world of five. A child counts many groups of five throughout the fun adventure from ducklings, rabbits and carrots, to sand castles, seashells, crabs, starfish and boats. A child has many opportunities to count, add, and subtract objects. Pages 30 to 32 demonstrate addition and subtraction, and how to write the number word five.
 

My Ten Book - Little ten plays with her ten robots through the four seasons of the year. During her many activities, with the robots and other toys, she demonstrates how these numbers can be put together and taken apart to make ten items. Children enjoy relating to the many holiday themes in the story. Pages 30 to 32 show many ways to add and subtract ten in written form, and how to write the number words.

For schools and libraries, Child's World distributes the My Number Books online at My Number Books - My Five Book
 and My Number Books - My Ten Book.