When I was five (and just learning to read) I was looking at a roll of TUMS on my mom's nightstand and read the letters backwards.
A few weeks went by and instead of just reading the letters, I could actually put the letters together. Instead of my mom's medicine being called S...M...U...T... I now knew it was called SMUT.
At the grocery store checkout stand a few weeks later, my mom was rubbing her temples while we were waiting to check out. I proudly said - so everyone could hear - "Mom, if you're feeling bad, just buy you some SMUT. It always makes you better."
Her jaw dropped, and I think she forgot about her headache.
A childhood belief about spelling

others believed things like this
- When I first started learning to read I was convinced that vowels were called barnacles.— Andy Howell
- I used to think "Zed" and "Zee" were two different letters.Anon
- From the first six letters of this word, I thought that “megalomania” had something to do with megalodons.— Enrico
- I used to believe that translating from language into language was only a matter of changing letters ! :) — EwS
- I believed that the breed of dog called Boxer was called that because they could stand up and box.Anon
- My sister told me that if you had sweetcorn in your poo, you had six months to live! I cried for weeks — Billy