As a child, I thought that the sky sometimes got dirty and needed cleaning (Incidentally, that was before I'd ever heard of air pollution.). I thought it because I'd heard of skyscrapers, and I envisioned that a skyscraper was a very long-handled blade for scraping the sky clean.
A childhood belief about technology

others believed things like this
- whenever i heard a melody, i thought it stuck in my stomach when i heard it in my mindAnon
- i used to believe that the "coin wash" was to clean my dirty pennies.— rmutt
- when i was younger i thought ac/dc's dirty deeds (done dirt cheap), was dirty knees and the thunder cheeks.— S
- a friend thought that the song "dirty deeds done dirt cheap" was saying "dirty deeds dunderchief"— dubs
- When I first heard of Amsterdam I thought it was "Hamster's Den"— Bootlebat
- The first time i heard of someone getting fired from a job, i thought that they were actually set on fire.Anon