When I was a child I thought that blankets had heat built into them. That
was why they kept you warm. The more you piled on the warmer you
would be. I can't remember when I stopped believeing this but it came
as a shock that I was wrong.
A childhood belief about physics

others believed things like this
- That blankets had some magic quality that made it so you could become warm and stay that way— Michael
- I used to believe that it was warmer during the day than at night because more people were about.Anon
- A hot totty was a hand warmer used in winter.— Kari
- When I was a child, I used to believe that when we slept, we stopped breathing.Anon
- I thought that cold was an actual, positive force and not just the absence of heat— terberous
- I used to think the song "Who Built the ark? Noah. Noah." was "Who built the Ark? No one, no one!"— Embarrassed Kent Girl