A friend of ours, and his brother were once told by their dad that the tv remote didn't use batteries and instead had a pizo electric system in it, and were told that to make the remote work they had to shake it up and down.
After three months of this their dad replaced the batteries in front of them and they realised how stupid they were.
they weren't young, 22 and 20 :)
A childhood belief about technology

others believed things like this
- I used to suck on the ends of batteries intent on gaining super electric powers. Anon
- I used to believe that I could make a laser by putting more batteries in a flash light.— Tyler
- my nephew used to believe that when people died, they just needed new batteries.— p-daddy
- I used to think that putting batteries in your ears could electrocute your brain. Hahahaha.Anon
- I used to believe that the remote control could control all the things in my house, including my dog.— Felipe
- When I was younger, my brother told me the police had an infra-red system and could see into everyones house.— Clare, Ireland