When I was a kid I used to believe that I had a super power: I could see through objects, as long as they were close enough to my face. I didn't tell anyone about that because I was afraid they would treat me like an "mutant", like on X-Men comic books, and send me to a concentration camp. A few years later, I figured it out.
A childhood belief about special powers

others believed things like this
- I used to believe that concentration camps were camps where you went to improve your concentration.— Ragnar
- I used to believe that you could stretch a rat's body to be super long.Anon
- I used to believe that the Super intendant was the Super Nintendo.— Lecia
- I used to believe that my mother didn't sleep and that she was a super hero!— AntoineBoom
- I thought that I could get a suntan if I stood really close to a fire for long enough.— Mat
- I used to think that the starwars weekly comic wasn't very strong.. duh.— TAM