Why do humans experience dreams every night while sleeping?

Humans experience dreams every night while sleeping because their brain is playing a fun game during rest time.

Imagine you're taking a nap on the couch, and your eyes close. Sometimes you see funny pictures in your head, maybe you're flying like a bird or running with a dinosaur. That's what happens inside your brain when you sleep: it’s making up stories, just like you do during playtime.

Your brain is like a movie maker that never stops working, even when you’re asleep. It uses the day’s events and memories to create little movies in your head, these are your dreams. These "movies" can be silly or exciting, just like your favorite stories before bedtime.

So every night, while you're resting, your brain is busy making up fun adventures for you to enjoy, that's why you dream!