Why are clouds white if the sky is blue?

Alright, little buddy, imagine the sky is a big, big ocean, and the clouds are like fluffy boats floating on it. The sky looks blue because the sunlight is like a rainbow, with lots of colors. But the blue part of the rainbow likes to play hide and seek, so it spreads all over the sky, making it look blue.

Now, the clouds are different. They are made of tiny water droplets, like the ones you see when you splash in the bathtub. These droplets catch all the colors of the sunlight and mix them up together. When you mix all the rainbow colors, what do you get? Yep, you get white! So that's why clouds look white, even when the sky is blue. Cool, right?