Tic-Tac-Ku Add On Kit For Colorku Board (Red/White) By Mad Cave Bird Games Turn your ColorKu Game into Tic Tac Ku game with this simple add-on! Includes 81 red and white marbles and instructions. Board is not included Strategic adaptation of the classic tic-tac-toe game Involves a lot of skill and strategy in order to win. There are two main variations for play For 2-4 players. Recommended Ages: 6+