Why Do Rainbows Have Different Colors?

Rainbows are like a paint box in the sky. When sunlight hits a water droplet, it slows down and bends, kind of like when you put your finger in a glass of water and the light looks bent. Then it bounces around inside the droplet before coming out again. Each color gets bent just a little differently, so they spread out and form a rainbow. That's why you see red on one end and violet on the other, it's like a prism made from tiny drops of water!