Up until some time in kindergarten, I thought that when you wrote a capital E you had to squeeze as many lines as possible in it. My teacher was not a very good teacher (she told us that we weren't allowed to tie our sweaters around or waists or touch our own blood. She also never corrected a kid that said her name wrong.) so she didn't care. It wasn't until my neighbor told me you're only supposed to have 3 lines in an E.
A childhood belief about spelling

others believed things like this
- When I was in kindergarten, I used to believe that they locked the teacher's in the teacher's lounge at night.Anon
- I used to believe that if I didn't jump the white lines of the zebra crossing I would dieAnon
- My mum told my older brother that dogs weren't allowed in London.— Fiz
- When I was younger I thought that the jets that leave lines in the sky were rockets — Harry
- I always thought the connectors on the telephone lines were flying turtles.— Angie B
- I thought the lines in the sky left behind by airplanes were "sky scrapers". Makes sense.Anon