I thought your teeth started out in your feet when you were born and they took a while to slowly travel up to your mouth before they popped through.
A childhood belief about general

others believed things like this
- 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 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 everyone was born as the opposite sex, and that you changed when you started school.— llama
- i used to believe that the world couldn't have possibly started before i was born.— emma
- I used to believe that eating burnt toast would make your teeth whiter and would brush your teeth for you.— Natasha
- Until I was about 8 I believed that your back teeth keep growing in until you have a full circle of teeth.Anon