When I was small and ran around a lot, I noticed I could hear wind rushing past my ears whenever I was running, and that rushing sound would stop whenever I stopped.
For a long time I couldn't figure out how the wind knew to blow only when I was running and stop blowing when I was standing still.
A childhood belief about physics

others believed things like this
- I used to believe that the wind was caused by trees so you could stop the wind by getting rid of trees.— Nira
- i used to believe (when i was little) i could make the wind stop and start by saying, "stop" and "start"— Ali
- i used to believe that if i looked at trees, the wind would start blowing. Anon
- I thought if 3 cards stopped at a 3-way stop sign then they had to stop forever until Christmas.Anon
- The trees moving made the wind blow.— little jimmy
- When I was a kid, I used to believe that windmills were what caused the wind to blow. silly me :)— Adrian Z. Ontario, CA USA