Easy to Learn - Only 1 Rule - Challenging Puzzles Give Your Child the Best Fun and Educational Tool to : Build Patience and Focus Greatly Improve Memory Strengthen Logic and Reasoning Improve Decision-making Skills Reduce Screen-time Occupy and Entertain Develop Pattern Recognition Learn New Concepts This engaging Sudoku puzzle book includes 3 different levels: Easy, Moderate, Difficult 30 puzzles 4x4 (easy) - 30 puzzles 6x6 (moderate) - 60 puzzles 9x9 (difficult) The instructions provided are easy-to-follow and will help your child become a sudoku champ in no time!