Gallium is a liquid metal much like Mercury that has a low temperature melting point – but without all the health hazards. If you enjoy science, this is fun to experiment with on its own right… but you can also mess with your friends.
Scientist pranksters are known for the “disappearing spoon” prank that involves molding this metal into a spoon – and watching as a poor colleague freaks out as their spoon melts while they try to mix sugar in their coffee. (Hehe) What sort of shenanigans can you get into with this metal? The possibilities are endless.