I used to believe that, if you concentrated hard enough, it was possible to make your body invisible. I remember wandering around the place, switching my invisibility on and off. If it seemed I was being ignored, then I took this as confirmation that my attempt at achieving invisibility had been successful. However, I never did anything strange while invisible, so I guess I wasn't too convinced of my own power.
A childhood belief about special powers

others believed things like this
- Yesterday I realised that invisible ink doesn`t make me invisible.— Jonathan Eleven years old
- When I was little *I thought that if I dressed in all white I would become invisible.Sadly,I wasn't.XP— Kiki
- I used to believe if I concentrated hard enough I could move stuff.
*sigh*
— Zog - I used to believe that when you closed you eyes you were invisible and no-one could see you!— Andrew
- I used to think that if I closed my eyes I would be invisible— invisible
- I used to think that One nation, under god, indivisible was invisible— Aeris