Imagine you have a big magnet and a little piece of metal. The magnet pulls the metal towards it, right? Gravity is kind of like that, but instead of magnets, it's everything in the universe pulling on everything else!

The bigger something is, the stronger its pull. So the Earth, which is huge, has a strong pull that keeps us on the ground. The Sun is even bigger, so it pulls on the Earth, keeping us in orbit around it.

Gravity is a force that makes everything in the universe want to get closer to each other. It's what makes things fall, what keeps the planets in orbit, and even what keeps galaxies together!