Explain Like I'm 5

So, you know how things have weight, right? Like your toy car or your favorite book? Well, gravity is what keeps them on the ground. It's like a big hug from the Earth!

Imagine you're playing with a ball, and you throw it up in the air. What happens? It comes back down to the ground, right? That's because the Earth is giving it a big hug, pulling it towards itself. We call that gravity! It's what keeps us on the ground, and what makes things fall down instead of floating off into space. Isn't that cool?