Explain Like I'm 5

OH BOY, GRAVITY IS SO COOL!

Gravity is like a big hug from the Earth!

You know how when you give your favorite toy a big hug? You hold it close and don't let it go?

Well, the Earth is doing that to everything on it, including YOU! It's pulling you close and keeping you on the ground so you don't float away into space!

That's why you don't float off your bed when you're sleeping, and why things don't just disappear into thin air. It's like the Earth is giving everything a big hug all the time!