100 Easy 4x4 Sudoku Puzzles for Kids: Mini Sudoku Puzzle for Children / Ages ...
100 Easy 4x4 Sudoku Puzzles for Kids: Mini Sudoku Puzzle for Children / Ages 4-6 / Large Print / Handy Size by Sharpened Pencil Press, Sharpened Pencil Press, ISBN 107139763X, ISBN-13 9781071397633, Like New Used, Free shipping in the US