The players roll a 12-sided dice and place a unifix cube on the correct product. Then the opposing player rolls and follow the same process. IF that player rolls the same thing, they can "bump" the player off the board. If the same player rolls that same product they can "king" the cube and can not be bumped anymore. Game is over when all circles are filled and the winner is the person with the most cubes on the board. I gave each player 14 cubes.