I used to think a lot about "favourite colours" and "favourite numbers". I used to wonder, if maybe, what I saw as red, other people saw as blue or green or something, and vice versa. I really hated the colour red, so I thought this might have been an explanation as to why some people's favourite colour was red.
A childhood belief about eyes

others believed things like this
- when i was little thought that ants changed traffic lights from green to red and vice versa.Anon
- i used to think that coloured people had the same colour skeletonAnon
- i used to believe that people with blue or green eyes saw that certain color— mellactica
- I thought that if you wore the colour red, you would go yo hell. — Tone
- when i was young i always thought that traffic lights were big lolly pops that changed colour— rudiger2
- I used to believe that the sun was an oversized colour changing M&M.Anon