When I was a kid I couldn't understand for the life of me how skateboards turned. I never owned one and I thought the trucks were immobile, solid pieces of metal bolted to the deck. My best guess was that when you leaned into a corner, it placed more weight on the wheels on one side and made that side slow down causing you to turn, kinda like how a tank turns. I didn't have a full understanding of how skateboards turned until I was at least 9 years old!
A childhood belief about hobbies

others believed things like this
- I used to believe that when people talked about 4x4 trucks, I thought it meant all the wheels turned.
— tracy - i used to believe that my brain worked like the inside of a clock. How the wheels cranked and turned.— Becky
- the summer that I turned 11 I waited out side on the step all summer for my hogwarts letter... ;D — Ginny weasley... not really
- I used to believe that if I chewed on one side of my mouth too much the other side would get jealous.Anon
- I used to believe that if I closed one eye, the people on that side couldn't see me.— KM
- I used to believe that semi trucks were cement trucks, and that actual semis were just big trucks.— Joe Schmoe