When I was young (I don't say "when I was a child," for the belief persisted until age 18), I believed that cauliflower was the same vegetable as broccoli, only it had been picked before it "turned green" (just as immature pumpkins are green, then turn orange upon ripening). When disabused of this notion -- in an embarrassing incident during freshman year (college) dining hall -- I realized that my parents had misled me in order to get me to eat my cauliflower, by associating it with a vegetable I already enjoyed.
A childhood belief about general

others believed things like this
- I thought if someone is in a vegatative state they literally turn into a giant vegetable!— Samilton Duerheiser
- my parents used to tell me and my sisters that if we ate our vegtables our eyes would turn green..— alex t
- I believed you had to color all the dinosaurs in coloring books green because all the dinosaurs WERE green.— Betty
- that the green traffic light turned blue when it was off— Kriket Evens
- When you lie your lips move or your eye turn green— Tanya
- I was told that if i didnt wash my hair regularly it would turn green— Mimi Screami