Think of exchange like a game where you and your friend have different toys. You have a toy car, and your friend has a doll. You want to play with the doll, and your friend wants to play with the car. So, you both swap toys for some time. This way, both of you get to enjoy something new.
Another way to understand exchange is like sharing snacks at lunch. You have a peanut butter sandwich, but you really want some of your friend’s cookies. Your friend is happy to share cookies if they can have half of your sandwich. You both trade parts of your lunch, and both end up with something delicious to eat.
Think about when you have a lot of crayons, but your friend has lots of stickers. You both decide to exchange some crayons for stickers. This way, you get to create beautiful art with both crayons and stickers, and your friend can do the same. Exchange is all about giving something you have to get something you want, making both people happy.