A Slinky is a fantastic toy that moves on its own. If you're a fan of Toy Story, you probably know Slink the Slinky, but you probably do not know what a Slinky can do. When you put a Slinky on some stairs, it will move down them.
There are two types of Slinky toys. The first option is made of metal, and the other is made of plastic. The metal toy is the better option because it makes noise when it maneuvers down the stairs.