Back in the early-80s when I was in kindergarten, one of my very favourite TV shows was Knight Rider. Back then my parents had a 1974 Chevy Camaro that I absolutely loved (when my father decided to trade it for a butt-ugly pick-up truck I was rather upset). I would go outside and hang around the car, pretending not to pay attention to it but stealing glances every so often to see if I could catch it talking (beats me why I just didn't go up to it and ask, "hey, can you talk?", but acting like a spy was just so much more interesting at that age). I conducted this top-secret experiment a few more times until, with a heavy heart, I realized it was just a "normal" car.
A childhood belief about tv shows

others believed things like this
- My little sister's imaginary friend was Kit the talking car from that show Knight Rider.Anon
- I used to believe, driving in front of all the other cars on the highway, Knight Rider was leading the pack.— Michael Kolassa
- I used to think I could sneak up on my reflection and catch myself not looking back at me.— Mary Poppins
- I used to think it was true that only ugly girls poop and I thought I was an ugly girl because I poopedAnon
- I wanted to grow up and be a truck. Not a truck driver, a truck. Anon
- When I was a kid I loved to eat onion rings, until I realized that they were made with onions.— Beth Pärssinen