I used to believe there were two spirits in front of my window (I live in a really high penthouse) commenting on my day: if I did something good, they were happy, if not... :)
I also was scared about snakes getting on my bed from somewhere, maybe a hole in the wall or something. And I was affraid of something attacking me if I didn't cover myself good with the covers... :
A childhood belief about monsters

others believed things like this
- My Mother used to tell me only the good die young and I would live to be 100+ years old because I was bad.— William
- I'm deaf in one ear. Until I was 7 I believed that if I didn't sleep on my good ear, dinosaurs would eat me.Anon
- I thought when someone was described as being "mild-mannered" it meant they didn't have very good manners— Samilton Duerheiser
- I had a little hole in the wall under my bed when I was little and I thought that Fraggles lived in there.....— Tina
- I used to believe that grown-ups got scared because they were so high off the ground.— Sammy
- When I was little I used to believe everything the government does is right and for the good of everyone.— Rob