I used to think that an “unrated” or “not rated” DVD was always some sort of ultra-adult edition of whatever it was. So when I saw several DVDs that were simultaneously advertised as “perfect for preschoolers” and “not rated” at the same time, I was confused and thought there was some kind of error.
A childhood belief about cartoons

others believed things like this
- I thought that 'burning' DVDs and CDs was literally incinerating them. — These Tunes Are FIRE!
- I used to believe that stars chirped because they would twinkle simultaneously to crickets chirping— alex
- I used to believe that commercials would only go away when you bought the product that was being advertised.— Hayabusa
- I used to think that if a movie was advertised on the side of a bus, that meant it was really good. — Aretia
- I used to believe that killer bees would take over the world by the time I was an adult.— Kristy O.
- When it rained, it rained all over the planet simultaneously— Artgoober