In Denmark (where I grew up) a calculator is called something that would translate back into "Pocket Calculator".
Because of this I often wondered as a child, how such a device could calculate the contents of my pockets.
A childhood belief about technology

others believed things like this
- When I was younger I cut my Barbie doll's hair and wondered why it never grew back.Anon
- when I was young, I thought Denmark was a state, just like Deleware and North Dakota.— valerie
- When I was eight, I thought my dad could translate what the birds were saying. I have no idea why.Anon
- As a child I always wondered why I could see everyone else's face and not mine.— Amit
- When I was a kid, I wondered why they called it "public hair" when it was so private.Anon
- that as I grew up, my parents would "grown down," then I would be the Mom and Mom would be my child.Anon