Heat Sinks
are like great ways to keep electronics cools. pull your pair of heat sinks out of your computer or refrigerator now and do other great stuff with them. like making really cold baths (or really hot ones, but that's a little more tricky). thermo-dynamics really get my jollies in a great formula for sustained goodness or such.
so go out into the world, freeze as many cockroaches as you can and watch them reanimate as they slowly thaw out.