It was back in 1994, I was 7 yo and when summer vacation was, every morning I watched educational cartoon for kids. One of episodes explained had does electricity works. I took their explanation of running electrons too literally, and for next few years I believed that when you switch on the trigger on the wall, line of little guys starts running through the inside of wire and gets crashed within the bulb, emiting lot of warm and making light!
A childhood belief about physics

others believed things like this
- I used to think running for president involved actually running somewhere.— Artimage
- In "God Bless America" I thought it was "With the light from a bulb" instead of "from above."— Carol
- I used to beleive that little drawf men were inside each traffic light, making them change colors. — alisha
- as a kid [until age 7] I used to believed that the tv
reporters were literally sitting inside the tv! — nüel - that God lives in the roof of our church and makes electricity to light the chandeliers— M
- I used to believe that you could get cancer from looking in the microwave while it was running.— Kayla