When I was little I believed commericals on TV were "live" and re-enacted over and over again each time they were repeated.
One Saturday night our babysitter was trying to get us to sleep at 11 PM- I protested that the kids on the "slip and slide" commericial were still awake and working so I could stay up too; she asked if it the commercial wasn't "recorded" then why was it sunny outside at 11PM at night? My bubble burst then and there.
A childhood belief about adverts

others believed things like this
- I used to believe when I was 5 that I was special because I couldn't get to sleep until 11pm at night — Carrie
- I, to this day, believe that when I can't sleep at night it means I'm awake in someone else's dreams... — Turner
- I didn't quite grasp the concept of time zones, and thought that Chinese kids went to school at night.— Giselle
- I used to believe that the bubble gum medicine was really made of bubble gum. i believed this until i was 16.— Shawn
- I used to believe that there was an off switch to the ocean so that it could go to sleep at night.Anon
- I used to believe that if I swallowed bubble gum, a bubble gum tree would grow inside of me. — Ryan