When I was a kid, my mom told me she carved my teeth out of the wood of the big pine tree in the front yard, just like George Washington's teeth (as if they were wooden, which I'm not certain of but I seriously doubt). For years, I thought my teeth were made of wood.
A childhood belief about general

others believed things like this
- Until I was around 8 or 9 years old, I thought dentists took your teeth out and replaced them with new teeth.— Verapamilo
- I used to believe that eating burnt toast would make your teeth whiter and would brush your teeth for you.— Natasha
- I used to believe that if I didn't brush my teeth at night, ants would crawl into my mouth and eat my teeth.Anon
- Until I was about 8 I believed that your back teeth keep growing in until you have a full circle of teeth.Anon
- When I was very young, I assumed that false teeth were taken from dead people's teethAnon
- When I was very young, I believed that houses were carved out of one gigantic block of wood.— tinmanjones