As a pre-teen, I had hormonal depression but didn't know it, so when I stopped finding toys and games fun, and everything felt bleak and boring, I thought it was a natural part of growing up for everybody. You didn't just outgrow playing certain childish games, you outgrew liking games *at all.* I figured that adults were all just miserable, or else that soon I'd "grow into" liking cleaning house, cooking, and doing taxes. I hoped it would happen soon, so I could be happy again.
(Don't worry, I'm on medications now! I got my "fun" back!)
A childhood belief about getting older

others believed things like this
- I used to think that board games were called bored games because you play them when you're bored.Anon
- I used to believe that boarding school was where people went to play board games.Anon
- When I was a child I used to believe that when I played video games my real world changed like the game. — J
- I thought there was some video games so hard that if you died on them you also died in real life!— Kakuri
- I used to believe toys came alive at night.
Because I love toys, and I hoped be good friend with my toys.Anon - i thought that we were all toys in a dolls house and giants playing with us was why we did what we did— Sarah