A set of large (about 1/2 inch square) wood dice all have one side painted. Each time you shake and roll them, you remove the ones with the painted side up. So there is a 1/6 chance of each die "decaying" in one roll. Do it a number of times and tabulate the number of dice remaining. Compare with probabilistic prediction. Demonstrates concept of half-life and also deviations arising from statistics of small numbers.