Sudoku Puzzles for Recess (Volume 2) (Puzzlewright Junior Sudoku) by Michael Rios - Paperback

Perfect for trips, rainy days, or downtime, these puzzles—created by the expert editors at Puzzlewright—will entertain kids for hours.
You’re never too young to start solving—and this collection contains 77 age-appropriate sudoku to introduce kids to the challenges and pleasures of puzzles. Children have plenty of number fun as they tackle 55 sudoku in a smaller 6x6 size to develop their skills, and move on to another 22 with regular 9x9 grids.