[daltore]

I kind of like the idea of ring toss. The box D has two, three, or four scoring pegs, and box C contains some large plastic donuts as well as standardized bases for the pegs.

My other thought was the game will be Pacman, and box D contains a segment of the barrier (which you can drive over but will get a penalty), and box C contains all the cheese. Robot-to-robot contact will be illegal across alliances with the exception of scoring cherries on the other robot.