I thought that if I could just get hold of a really small and sharp pair of scissors, I could cut up a piece of paper over and over, eventually finding out whether matter was infinitely divisible or made of atoms (my father claimed the latter was true, and at the time I thought this was really suspicious).
A childhood belief about physics

others believed things like this
- when I was small I always thought that the solar system ended, and then it was just white paper after that— sparrow
- I used to believe fax machines instantly teleported a piece of paper to who ever you wanted. Anon
- If you hold your breath and make a wish under a highway tunnel it will come true....I still hold my breath :)— aj
- I thought the white circles you see when looking at a bright window were what atoms of air look like.— H.
- i use to belive that mum could vac up my toy no matter how big or small— beach bum
- When I was a kid I thought babies where made when people hold hands and kissed nude...— Ryan