Sudoku 6x6: Sudoku for Kids: 6x6 Medium 100 Puzzles Games Book with Solution for Beginners Vol.3 Space Themed, Kids Ages 6-10, 8-12 (Paperback) - Walmart.com
Sudoku - 9x9, 6x6 and Samurai Puzzles
Buy Killer Sudoku Puzzles - 400 Easy to Expert 6x6 vol. 15 Book Online at Low Prices in India | Killer Sudoku Puzzles - 400 Easy to Expert 6x6 vol. 15 Reviews & Ratings - Amazon.in
puzzlemix.com: Sudoku-X instructions and free Sudoku-X puzzles to play online