When I was very little, I used to think that sticks that had fallen from trees and were lying on the ground were a hard, non-smelly version of dog poo.
A childhood belief about plants

others believed things like this
- I used to believe that the cows owned by my grandfather slept lying on the ground like a human at night.— Eric
- I thought a "fallen soldier" was one who'd tripped and fallen during a battle.Anon
- I used to believe that if you crossed your fingers when you were lying, you weren't really lying.— jo
- I once told a friend of mine that if you held in a smelly burp, it'd turn into a fart. She believed me.Anon
- I used to believe wind came from trees. And when it was really windy, the trees were really mad.— Tiffany
- I thought ground beef was the meat they scraped off the ground at the slaughterhouse. Yuck.Anon