Bump is a super fun and easy (no prep) way to teach multiplication fluency. Two or more players each pick 14 of the same color unifix cubes. Each player takes turns rolling a 12-sided dice and placing a unifix cube on the product of the chosen factor and the one they rolled. If the space is open, they set one of their cubes on it. If the space is TAKEN with someone else's cube, they can "bump" that person off. If a player rolls a space that they have already placed a cube on, they can "king" that space and nobody can bump them anymore!