I've been having fun lately with my expired Polaroid 600 film. The chemicals in the developing film respond to temperature ~ I usually just hold them inside my shirt against my belly to warm the colors. The other evening I took these (in a mirror, by lamplight) and then placed them on the top of the wood stove, then popped it in the freezer. The heat pulls out the warm colors, the cold, the cool.
Polaroid film is probably the thing I would choose if I were stuck on a desert island.