This is a great way to teach children how to have fun with numbers at a young age, instead of growing up intimidated by them! This book is designed to be a great way to start kids ages 8-12 on Sudoku, but it is good for beginners of all ages. It should provide enough difficulty as the book progresses to keep even older kids challenged and amused. Have fun, and always remember: once you look at the solution, you can never unsee it! ...