After watching blue peter it showed a diagram of a person's circulatory system. Half the blood was red and the other hal was blue.
For years, possibly until i was about 13, I believed that some of our blood was blue and couldn't understand why I'd never seen my blue blood before
A childhood belief about general

others believed things like this
- I used to think that blood was blue until it touched air.— paetrw
- I thought the blue veins in some cheeses were actually blood vessesls!— Helen
- Eifel 65 - Blue
I'm Blue (if I was green I would die...)
[I'm blue, da ba dee, da ba di.]— Matt - The song "Reverend Blue Jeans" turned out to be "Forever in Blue Jeans." Who would have believed that?— music lover
- 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 TV finished after Blue Peter.— Jen