put a toothpick for a sword in a peep and put 2 in the microwave and zap them...the first one to explode wins (I think). I thought it sounded like a fun thing to do.
Let me see if I can find the post describing it.
eta: here it is
It's a silly little game. You need a bunch of Peeps, a handful of toothpicks, some paper plates, and a microwave.
You take 2 Peeps, poke toothpicks into their bellies and put them on paper plates, facing each other with their toothpicks pointing at each other about a half an inch or inch apart.
You pop the plate in the microwave and rev it up for about 2 mintues. DO NOT leave the microwave unattended. Not only is it not safe, you'll miss all the fun.
After a few seconds in the microwave, the peeps will start puffing up dramatically. Eventually one will stab the other and deflate it. That one is the loser and the one left upright reigns victorious.
It's definitely a hit with kids, but it's also hysterical to see a bunch of fully grown adults crowded around the microwave cheering them on.