i used to think that cartoons like "Tom and Jerry" were performed by real actors in cat and mouse suits, using speicial effects and a special camera that made it look like a drawing. i was probably like 5 or 6 when my mom explained to me how it worked for real.
A childhood belief about cartoons

others believed things like this
- I thought cartoons were real, I remember asking my mom why there were lines around the "actors" in a cartoon.— Steven Graziano
- i USED To beleive that cartoons were real and i made them my imageniary friends!— Shaman Queen
- 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 thought cartoons were for kids and "real-life programs" for adults.— Ichigo
- I used to think that the laugh track on sitcoms were the camera men, directors, other actors, ect. laughing.Anon