I used to believe that cars drove because of hundreds of little people living inside them turning treadmills. I felt rather betrayed when I found out otherwise.
A childhood belief about cars

others believed things like this
- When I was little I used to believe that cars drove themselves.Anon
- I used to believe that self drive cars actually drove themselves!Anon
- i used to believe the turning signals on cars helped them turn sharp corners.— Julia
- I thought that people were like cars because cars have exhaust pipes, and people fart.— Matt
- I believed that traffic lights had police officers inside them, turning the lights on and off...— CrowHeart
- I believed that the inside of a tomato was a small, living creature and I flatly refused to eat that bit.Anon