When I was little I used to believe that at plays, if the main character started out as a child in the first act, they were given a pill or medicine that made them grow into an adult for the second act. It never occurred to me that it was two different people.
A childhood belief about general

others believed things like this
- When I was a child, I thought that grown-ups were adult.— Gloria
- I used to believe that the bubble gum medicine was really made of bubble gum. i believed this until i was 16.— Shawn
- When I was a child, I used to think that the humans grow up like the dinosaurs — Pretty
- I used to believe that I would never grow up, because I "wanted" to remain a child. Ha. That one fell throughAnon
- When I was a child, I used to think that if I lied my nose would grow bigger.Anon
- I used to think that adult kangaroos were called Kangas and that child kangaroos were called Roos. Anon