Explain Like I'm 5

So, you know how things fall down when you drop them, like your toy blocks or your favorite ball?

That's because of something called gravity. Gravity is like a big hug from the Earth. The Earth wants to keep everything close to it, so it pulls on everything that's near it.

Imagine you're playing with a friend, and you're holding hands. You're holding hands because you want to be close to each other, right? The Earth is like a big friend that's always holding hands with everything on it, and that's why things don't float away into space. Isn't that cool?