On a worksheet at school, we were given the task of going through a list of different animals and picking out the ones that were mammals.
Curiously, one of the choices on the list was "clown", so I spent a long time believing that clowns were a different species to people.
A childhood belief about clowns

others believed things like this
- I used to believe that the credits at the end of a movie was a list of people in that were watching it.— jon_
- I used to think people were made of dirt and mayonnaise. I kind of rememeber picking this up at church.— julia
- When I was in elementary school I use to think that teacher lived at school at their desks all year long.Anon
- I used to believe that clowns were born that way.— Kelly
- Clowns were born like thatAnon
- My sister used to believe that clowns were born that way.— Bonnie