David Karn Mini Sudoku for Kids - Easy to Hard, Travel Size Vol 2: 100 4x4 + ...
David Karn Mini Sudoku for Kids - Easy to Hard, Travel Size Vol 2: 100 4x4 + 6x6 puzzles, 32 pt font size, 1 puzzle per page, 5x8" small format by Karn, David, ISBN 169881190X, ISBN-13 9781698811901, Like New Used, Free shipping in the US