Dreams are like stories that our brain makes up while we sleep. It's like our brain puts together things that we've seen, heard and thought about during the day and makes up a story. It's a way for our brain to make sense of what we've experienced and how it makes us feel. Most dreams are pretty strange because our brains are mixing up a lot of stuff so the stories don't always make a lot of sense. But sometimes our dreams can mean something about how we're feeling or what we're thinking about in our lives.