Explain Like I'm 5

So, you know how things fall down when you drop them? Like if you drop a ball, it falls to the ground? That's because of something called gravity.

Gravity is like a big hug from the Earth! The Earth is giving everything on it a big squeeze, and that's what keeps us and everything else stuck to it. It's like when you give your favorite toy a big hug and don't want to let it go. The Earth is doing the same thing to everything on it, including you!