When I was young (about 3), I learned how to pronounce simple words from Sesame Street. They would sound out each letter of a word and then say the whole word. From this, I believed for a short time when you said a new word, you always had to say "buh...buh..." before it (sounding out the letter B), as in buh...buh...hand.
A childhood belief about speaking

others believed things like this
- I used to pronounce the word "Computer" as "Crocuta"
Anon - In first grade, I thought that if I've never heard of a word before, then it wasn't a word.— Destiny
- I used to think the word fever was just another word for giraff— Marshall m
- When I was young, I heard the word 'minion' for the first time and thought it was a miniature onion.— Karin
- I thought the word economical was actually two words: eek and omical.
— Nancy M. - I thought that the word Copyright was like copying your right hand on the copier.Anon