When I was very young -- before kindergarten -- I was already very good at reading and spelling. Like other kids here, I asked my parents how to spell the letters of the alphabet. How do you spell A? How do you spell B? etc.
I accepted their answer that letters were not things that you spell because they're the things that are used FOR spelling. I decided I would try to spell the letters anyways. I remember writing them down: Ay, Bee, See, Dee, and so on.
See was more properly spelled Cee, because I thought the word should be spelled with the letter that it means. I was particularly proud of Aitch, even though it has the H at the end rather than beginning with H. I was quite baffled by Kew (Kyoo? Cue?) because I couldn't get a Q into it. If I'd known the word Queue at the time I might have considered the project more of a success.
A childhood belief about spelling

others believed things like this
- When I was, like, three, i thought my cat was an evil sorcerer and would cast a spell on me. XD— Bobbet
- i used to spell eight "ate" cuz of the stuped: why was six afraid of seven, cuz seven ate(8) ten joke...— 8
- When my sister told one of my brothers her e-mail address, he thought to spell out “at” instead of typing “@”.— EJ - no longer computer illiterate!
- I had my wife convinced that Steven Hawking made his fortune as the original voice for the speak N spell toy.Anon
- From the first six letters of this word, I thought that “megalomania” had something to do with megalodons.— Enrico
- I used to believe the word shoes was spelled shouse. It looked right to me... — Shouse