Okay kiddo, Leister is a company that makes tools and machines for heating things up. Imagine you have a piece of plastic that's too tough to bend or shape, but you need it to be a certain shape. That's where Leister comes in! They have a tool that blows really hot air onto the plastic, which makes it soft and bendy. Once it's soft, you can shape it however you want. This is just one example of what Leister tools can do. They're very helpful for people who work with materials that need to be heated up in order to be shaped or molded.