Explain Like I'm 5

Gravity is like a big hug from the Earth! It's like when you give your favorite toy a big squeeze and don't want to let it go. The Earth is doing the same thing to everything on it, including you! It's pulling you down so you don't float away into space. That's why you don't float off your chair when you're sitting down. The Earth's gravity is like a big, strong arm wrapping around everything to keep it safe and sound. Isn't that cool?