When I was about 7 a teacher explained that the whole universe was made up of molecules, which were smaller than a pin head and that there was very little difference between one molecular structure and another. For years I believed that if I had an injection or pricked my skin with a needle then I would distort my molecular structure and turn into a table or something.
A childhood belief about chemistry

others believed things like this
- I used to believe the large metal structure in Paris, France, I thought it was the "Eye Full Tower"— Janet
- I used to believe that if you ate too many carrots your skin and hair would turn orange. — Mariah
- I used to believe that if you drank coffee before you were an adult, your skin would turn gray. Anon
- When I was little my dad told me that if you drank too much coffee it would make your skin turn black. Anon
- if you drank coffee before your 16th birthday, your skin will turn purple.Anon
- my mother told me if i ever swallowed chewing gum i'd turn into a pig, i believed this for many years.— stuart hayward