I remember making myself a pair of Icarus wings out of cardbord. I drew wing shapes and cut them out and made arm straps too. I was really convinced that I would be able to run down the street flapping my arms and take off.
Needless to say, I was heartbroken when it didn't work. :(
A childhood belief about physics

others believed things like this
- I thought buffalo wings were wings from a buffalo, for years I looked for their wingsAnon
- My uncle once said that elves were really badchildren made to work in santa's work shop— Some guy
- I used to believe that if you ate enough chicken wings, you'd sprout wings and be able to fly.Anon
- i used to believe that if i didn't work at school, i would have donkey ears, so now i work hard !!!— denis
- When I was little, I used to believe that wind was caused by whales flapping their tails way out in the ocean.— Nanohawk
- If i farted in the tub the bubbles would be different shapes.Anon