I used to believe that heaven was in the moon.
I was also taught about the end of the world and how the "good christians" would have to hide from the "beast" which supposedly was some government who wanted all religious people dead. I would cry because I thought that meant I would die or have to go into hiding before I was a teen, which meant I'd have no kids or be able to go places like Disneyland and basically not have a life of my own. That's pretty harsh for a kid.
A childhood belief about afterlife

others believed things like this
- I used to believe that all Christians were English and all other religious people were foreign.Anon
- I used to believe that a street sign that read "Dead End" meant that there were dead people buried there.Anon
- I used to think that "cross-eyed" meant that people had X's for eyes, like dead people in cartoons.— Tim
- when i was younger i thought that areoplanes drove dead people to heavenAnon
- i used to believe that stars were people in heaven and the moon was god— Jessica
- i used to believe that sex meant love and that having sex meant the two people would live happily ever after.— amy