I used to think that cartoons were people in costumes and I was upset to find out they were drawings because I thought it would be a cool job to walk around in a costume.
A childhood belief about cartoons

others believed things like this
- When I was a kid I used to believe that cartoons were people dressed up in special costumes.— Sarah-Jane
- I used to think that "cross-eyed" meant that people had X's for eyes, like dead people in cartoons.— Tim
- I used to wonder why people didn't have outlines like they did in cartoons.— Anna
- I used to believe cartoons were real people and animals. They were just wet.— Wendy
- I used to believe cartoons where real people. You can imagine how that went... — Emma
- i used to think that my dog was an old man in a dog costume— Kate