When I was 12, I thought that passing an electric current will boost up my IQ. So, I put DC electrodes on my forehead and let the current run (it was a 12 V electric current). I thought I can see the current flowing throught my brain and I thought I became smarter. I tried this everyday and I thought myself became smarter and smarter. One day, I used wrong plug and current so that it almost electrocuted me and the main fuse of the house went burnt out. As a result, my mother beat me several times.
A childhood belief about physics

others believed things like this
- I used to think that I was smarter than adults. Now I know kids are smarter than adults in many ways— Marshall M
- I thought that big people are necessarily smarter because there brains would be bigger— Quatsch
- I used to think that when I ate vegetables I will be smarter.— Dark_X_Raider
- I remember thinking that non-English speakers were much smarter because they could speak "so much faster." Anon
- My mother told me that if I lay too close to our electric radiator (heater) my brains would melt.
— robyn c. - I use to believe if I ate something electronic Id have electric powers — jack L