As a kid, my brother used to believe he could split atoms. And so, he would walk around wildly swinging a stick trying to hit some atoms. :)
A childhood belief about chemistry

others believed things like this
- I thought the white circles you see when looking at a bright window were what atoms of air look like.— H.
- We used to think that if you ran swinging your arms around, you would run faster. — Christine
- my brother (10) still believes that if you stick your finger to far up your nose you can touch your brainAnon
- I used to think that if I was swinging on a swing fast enough, I could jump off it and start flying.— Nick
- i used to picture jesus as a kind of cartoon Tarzan, swinging through the trees...— bex
- I used to think Jaywalkers were people who walked briskly whilst swinging their arms.. whoops!— Lisa