I used to believe that thunder was made by the clouds bumping together - lightning was the sparks as they hit. I used to watch the clouds when it was just raining, and wonder why only some clouds made a noise when they collided...
A childhood belief about physics

others believed things like this
- I used to believe that when it would be raining the white clouds lost to the dark clouds.— janet
- I think thunder is the clouds fighting and bashing eachother and lightning is fire balls from the sun.— Crazy Cowgirl MADI
- Clouds were made in factories — Rebecca
- I used to believe that the clouds were made by cotton.— Renato Gonçalves
- When I was a kid I used to believe that clouds were made of sugarAnon
- I used to belive that clouds are made in a factory! — Toni