Okay kiddo, have you ever seen ants walking in a line, all following each other? That's an example of emergent behavior! Emergent behavior is when a group of things or creatures act a certain way, even though none of them are in charge.
Imagine you and your friends all decide to play a game of tag. You might not have talked about how to play the game, but everyone will know to run and try to tag each other. That's because you've all agreed, without even saying it, to follow certain rules or behaviors.
Emergent behavior can happen in all kinds of groups, from bug colonies to people in big cities. When lots of things interact, they can create new patterns or behaviors that none of them could have predicted on their own. And that's pretty cool!