Up until I was about 25, I had always assumed lily pads were just freely floating leaves. I could never figure out why on earth the frogs didn't sink when they jumped on them! of course, I eventually found out that they grow on stems, but to this day, I get laughed at about this belief!
A childhood belief about plants

others believed things like this
- if you drink water from unsafe places, frogs will grow in your stomach...— Olivier
- I used to believe people grew from spores and when we got old, we'd grow leaves and flowers etc— Calvin (from my pet tiger Hobbes)
- i used to believe if a cat ate a bird the cat would eventually GROW WINGS!— nightmare
- When I was little I use to belief that if we swallowed the pit of a fruit, a tree would grow inside us.— Maya
- i thought that when it was your birthday you grow and then you didn't grow until a years time.— hello
- i thought fog had something to do with frogsAnon