Up until I was in the 5th or 6th grade, I believed that the reason there were two pedals in a car was because one of them was "go forward" and the other was "go backward."
A childhood belief about cars

others believed things like this
- I though the "D" written in "Walt Disney" on some videos was actually a backward "G".
— A. Nonymous - i believed that little men sat in the back of vending machines and pushed the sweets forward.— rachael
- I used to believe that the exhaust fumes coming from a car were actually what pushed it forward like a rocket — rocket car
- In first grade I believed that I was from Mexico because I could count to ten in Spanish.— Lara Roy
- Up until I was in 3rd grade I believed my bathing cap is what kept me afloat in the swimming pool! Anon
- I believed that our teachers lived at school. They were teachers--they had no reason to leave :)(Anon