I used to believe that each people has their own perception of color, for example: I see color red as red, but when I was a kid I used to think that others may perceive different. I see red but they see other color, and we describe the same color because we are used to it since birth.
A childhood belief about physics

others believed things like this
- I used to believe that before color television, people only saw in black an white.— CD
- When I was little, I was told that God made people of every color.....I was sure he used a big toaster.— stormy
- i used to believe that people with blue or green eyes saw that certain color— mellactica
- When I was younger, I used to think that people with different colored skin had different color poops.— Samuel
- I thought that little tiny people changed the color of the stop lights.Anon
- I use to think polka dot was a color.Anon