A math game in which players destroy each others' cars with arithmetic, measurement, and dice.
Players put their cars on the table. They point their cars where they want to go, roll a die to determine speed (distance in that turn), and if they hit another car, their speed determines the damage done to the other car. Last man standing wins. Optional rules allow defeated players to stay in the game.
This is just a set of rules and list of materials. I've played this with my class, and kids liked it. You can use this for addition, subtraction, or multiplication, and you might even change emphasis to probability if you feel like it. Could be adapted up through high school by changing the damage formula. You might even involve measurement of angles and even trigonometry.
Warning: This game can get pretty cutthroat.