Explain Like I'm 5

Gravity is like a big hug from the Earth.

Imagine you're playing with a ball. You throw it up in the air, and what happens? It comes back down to the ground, right? That's because the Earth is giving it a big hug. The Earth wants to keep everything close, so it pulls on the ball with an invisible string. That's gravity. It's like the Earth is saying, "Come back here, I want you!" And that's why you don't float off into space when you're standing on the ground.