Numbers are boring (sorry, accountants). So this reinterpretation of Sudoku by Brass Monkey uses colored wooden balls instead. Includes 81 balls and a game book with hundreds of setups to solve with friends (or by yourself if you're into that). Bonus: everything stores away into the box (that is also the game board) so it's perfect for traveling. Box measures 7.8 inches square, 2.8 inches tall.