When I was a kid, I used to believe that the green outer rind of watermelons (and for a while, the white part too, lol), was poisonous.
A childhood belief about watermelons

others believed things like this
- that the green bit of cucumbers was poisonousAnon
- My visual representation of GOD was Mr Clean wearing a white robe... but his skin was a green/yellowish color.— Ryan Williams
- I used to believe that if I ate too many watermelons I would turn into water...— Peter
- When I was really little I used to belief that fireworks dropped out of the sky from outer space.— davesgrl2001
- I used to think that up in outer space the sun was a gigantic baby that never grew up like in Teletubbies.— WeirdButProud
- As a child I used think if I jumped too high on a trampoline I'd be sucked up into outer space.— Jenn