Explain superconductors like I'm five years old

 Okay! Imagine you have a super fast slide. Normally, when you go down a slide, it slows you down a bit because there's some friction. Now, imagine a special slide where there’s no friction at all — you just keep going super fast without anything slowing you down.

A superconductor is like that, but for electricity! Normally, when electricity flows through wires, some of it gets lost as heat because of resistance (kind of like friction for electricity). But with superconductors, electricity can flow without losing any energy at all, just like that super fast slide with no friction! The trick is, superconductors only work when they're really, really cold, like colder than ice, almost as cold as outer space!