The Best Sudoku Book For Kids This book contains over 200 Sudoku puzzles of varying sizes and difficulties to get you solving puzzles in no time - 300 Sudoku puzzles - 100 easy puzzles - 100 normal puzzles - 100 hard puzzles - solution - Designed for kids five and older, but great for beginners of all ages - Great gift, and a great travel book for a long car or plane r.