Publisher: (Unknown), Mad Cave Bird Games, Morning
ColorKu is a high-quality wooden board game based on the popular Sudoku puzzles. It uses 81 wooden marbles in nine distinctive colors placed on a 9" x 9" wooden grid to solve puzzles. The board is solid wood and 13½" x 13½". The game comes with 104 puzzle cards, but it can be used to solve any Sudoku puzzle.