i used to believe that my parents were government spies that were in high tech disguises and reported to offices in other dimensions. i also used to believe that everyone i knew had access to a live feed of every single thing i did, including going to the bathroom and bathing, and judged me on my looks and behavior. AND one last thing. i grew up in a shomer shabbos (we kept the sabbath in the orthodox jewish tradition) house and was convinced that everyone i knew was involved in an elaborate hoax to make me think is was sunday when it was really saturday and therefore i was breaking the sabbath
A childhood belief about family

others believed things like this
- I grew up Jewish. Until I was about 10, I believed that everyone who wasn't Jewish was Catholic.— Philm35
- I thought break dancing involved actually breaking stuff!— Sydle
- I used to think that everyone's birthday, including my own, always had to be on a Sunday.Anon
- i thought that our cats were secret spies for my parents and i would never do anything bad around them. Anon
- I once knew a girl who used to believe that the sun was actaully a really bright gold fish very high up.— meow
- i didn't beleive this, but a kid my sister knew thought if he screamed in a really high voice, he ran faster.Anon