When my sister was about two or three, my mother told her she has an eyeball in her bellybutton, and she believed she could see out of it.
She used to lift up her shirt to get a better look at things.
A childhood belief about belly buttons

others believed things like this
- I was told when young that if i kept poking my bellybutton my bum would drop off.— vicky
- My uncle told me if you twist your bellybutton, your bum will fall off, I was terrified!— little2ft
- I never knew why boys had to lift up the toilet seat...until my friend told me that boys had bad aim.Anon
- I used to think that when people were taking their contacts out that they were taking their eyeball out :) — Jen
- my mother told me if i ever swallowed chewing gum i'd turn into a pig, i believed this for many years.— stuart hayward
- My older sister told me squirrels were poisonous, and I believed her until I was 9.— Jenni