Static electricity is an electric charge that stays in one place, instead of moving to different places like electricity that comes out of a wall outlet. Static electricity comes from rubbing together two different materials. When you rub together two materials, like a balloon and your head, some of the electrons (tiny parts of the atoms that make up the materials) get transferred from one material to the other. This leaves one material with more electrons and one with less, so they have an electric charge. After the rubbing stops, the extra electrons stay on the one material. This is static electricity. It can even cause sparks!