This coloring book is an adventure of the numbers one to twenty. In this book, I would like to present math to young kids as a way of fun. They can color the numbers and the objects that represent the numbers. They can see that there is more than one way to get to the same result. It is a book for children from ages four to seven, who are beginning to learn about numbers and math. This is the second book of a series, that book is the version of Subtraction, it will start from number one and will add one number and object in each page until number twenty.