Fun, challenging, and educational! This is an excellent starter book of puzzles, the right choice for a child's first introduction to sudoku, a good activity that reinforces logic and problem-solving. Benefits: Great way to keep a child busy and entertained!Really good for children to start to learn sudoku.Great book for kids who love numbers.Great product that is portable and doesn't require an electronic device.Details of this book:50 Puzzles "9x9" Easy and MediumSize 8.5″ x 11″