What does condensation mean for kids?

Condensation is when a vapor turns into a liquid. That is why you see water droplets on or inside of items in a refrigerator.

For instance, take droplets inside a jug of milk. While the milk is sitting out, some of the water content in it evaporates inside the container but does not leave since the lid is on. Then you sit in inside the refrigerator. That vapor turns back into water because the refrigerator is cold, and the liquid runs back down the inside of the jug.