When I was a kid, I used to think that when there was a tooth mouse and my baby teeth came out, I would leave them under my pillow to give me money.
When I was a kid, I used to believe that clouds were cotton and that I could climb when I'm on a high mountain like in Dragon Ball Z
A childhood belief about fairies

others believed things like this
- When i was child i used to believe that when i lose one tooth, a little mouse will give me some money.— Daniele
- when i was a child i used to believe if i put my tooth under the bed the tooth fairy would give me money— milena
- When I was a child I used to believe in the little mouse Perez, who gave you money for teeth.
— Chayma - when I was little I believed that if I put a white stone under the pillow with my tooth I make more moneyAnon
- I used to think that the tooth fairy puts you in a deep sleep before stealing your tooth/teeth.Anon
- I used to believe that in the tooth fairy took all your teeth and built a tooth city for her to live in!Anon