I used to belief that mangoes were blue, because of a children's book where they were painted that colour. i was horrified when I realized that they weren't! I'm still searching, there must be some out there somewhere...
A childhood belief about general

others believed things like this
- I was convinced that children weren't humans, only adults were, children were a total different race!— Leda
- Eifel 65 - Blue
I'm Blue (if I was green I would die...)
[I'm blue, da ba dee, da ba di.]— Matt - You know the eifel65 song "Im blue da be da ba di"
I thought he said "I'm blue I'm in need of a guy"— Anna - I used to believe that angels painted the sky.— Jessica
- The song "Reverend Blue Jeans" turned out to be "Forever in Blue Jeans." Who would have believed that?— music lover
- I used to think all mice were white and those whom had other coloring were just painted— Feral