I used to belive that the only factor that made a difference to how well a sailboat sailed was how pretty the sail was. As far as I could understand, any boat with a plain white sail --even a million dollar yacht-- couldn't possibly sail well.
A childhood belief about physics

others believed things like this
- i used to believe that the world couldn't have possibly started before i was born.— emma
- i used to belive that before films were coloured the whole world was black and white— daniel phelps
- I used to belive you couldn't stop growing until you were bigger than godzillaAnon
- I used to think that boysenberry was poisonberry and couldn't understand whay anyone would want to eat it.Anon
- I could NOT understand why, if a pen worked on paper, it couldn't also write in thin air.— Can you guess what it is yet?
- When I was little, I couldn't understand why people called me a tomBOY, instead of a tomGIRL.— Amanda