David Karn Mini Sudoku for Kids - Easy to Hard, Travel Size Vol 1: 100 4x4 + ...
David Karn Mini Sudoku for Kids - Easy to Hard, Travel Size Vol 1: 100 4x4 + 6x6 puzzles, 32 pt font size, 1 puzzle per page, 5x8" small format by Karn, David, ISBN 1698811381, ISBN-13 9781698811383, Like New Used, Free shipping in the US