A belief I held high for a long, long time: Allotment gardens were the result of our Dutch government's bigoted perception of handicaped people.
People with achondroplasia (dwarfism) were forced to live outside of town, in special little villages at the edge of town or along the highway, because they would only cause trouble in a busy town's traffic; according to our government their anatomy would probably make them not manoeuvrable enough to cross busy roads (people in central Holland drive like maniacs), and they would be too short for people to notice.
This belief held ground --and made my blood boil for the injustice-- until I was 15, because it made sense. Most allotment gardens have sheds that look like miniature houses (complete with cosy-looking curtains) and most have all sorts of vegetables growing - indicating the need for self-sufficiency.
... Phew.
A childhood belief about in the street

others believed things like this
- I used to think all television shows were made at the tv station on the hill of my home town. — Monique
- I used to believe that clouds were made from a factory chimney that was south of my home town. — bynbyn
- I used to believe that people from Holland were called "Hollish", like people from Poland are called "Polish"— Sally
- I used to think that "cross-eyed" meant that people had X's for eyes, like dead people in cartoons.— Tim
- i used to believe people were put in coffins because they were special cars that could drive you to heaven!— jym
- That everyone had the same amount of skin and that short people were fat and tall people were skinny.Anon