Explain Like I'm 5

Gravity is like a big hug from the Earth.

Imagine you're playing with a ball. When you throw it up, what happens? It comes back down to the ground, right? That's because the Earth is giving it a big hug. It wants to keep the ball close to itself. That's gravity. It's like a magic string that pulls everything towards the Earth. That's why you don't float off into space when you're standing on the ground. The Earth's gravity is keeping you safe and close.