When I was small, I was absolutely convinced that I invented a different way to write the number four. There was the traditional method of writing the 4 as the typewriter types it, but I thought I invented the method of not having the top of the 4 touching. I know it's crazy, but I thought this for years.
A childhood belief about counting

others believed things like this
- I thought that some animals had just been "invented" recently (like within the last 50 years or so)— Makron
- Up until 8th grade or so, I was convinced that I invented the word "Fart"— Jonah
- I thought Napoleon invented linoleum.— Steve Murphy
- I thought that Devil's food cake was invented by Satanists!— Dietrich Corby
- I thought french fries were really invented in France (they are Belgian for those who don't know)— Quarm
- I was about 6 and thought my family invented the fart because I never heard anyone outside my family do it.— Bob