A kindergarten coloring book can educate a child in an fun way. The pictures in the book can include everything from letters and number to apples and oranges and people and animals. This variety prevents boredom and keeps a child engaged. A kindergarten coloring book can be an essential tool to teach a child how to stay within the lines and how to correctly hold crayons. Since the child is having fun he most liekly won't realize that he's learning.