When I was a kid I thought that New Hampshire was pronounced New Hamster. I couldn't for the life of me figure out why everyone (including the teacher) laughed at me in 5th grade when I gave my presentation on New Hamster!
A childhood belief about speaking

others believed things like this
- For the longest time I believed New Hampshire was New Hamster and that was where all the hamsters came from. — Giny
- I used to think that if you were the teacher's pet, you would turn into a hamster.Anon
- When I first heard of Amsterdam I thought it was "Hamster's Den"— Bootlebat
- When I was a young boy I thought when we cried or when we laughed we won or we lost one minute of our life. — loulou83
- A[n] nth grade teacher only had to finish the nth grade when he or she was in school.— MD Caruso
- I used to believe that "euthenasia" was "youth in Asia", and I couldn't figure why that was A Bad Thing.— Kellye