Explain Like I'm 5

Gravity is like a big hug from the Earth. The Earth wants to keep you close, so it pulls on you with a strong hug. That's why you don't float off into space when you're standing on the ground. It's like when you give your favorite teddy bear a big hug and don't want to let it go. The Earth is like a big teddy bear, and it's always hugging you with gravity. That's why you don't float away.