When I was younger, about 6 or 7, my "imaginary siblings" were a whole plethora of cartoon characters, and I talked to them and everything, I really seemed to believe that they were real...
A childhood belief about imaginary friends

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 thought my imaginary friend was real and he imagined me
I hope he still believes I existAnon - I used to have an imaginary friend named Mr. Nobody. He would protect me from my imaginary enemy, Bad Elmer.— Kdees
- When I was younger, I seriously believed Peter Pan was real and would take me away to Neverland.Anon
- I used to believe you had to marry your siblings when you grew up.— Cade Whitbourn
- My siblings told me that if I ate too much cheese, I'd turn into a cow. I believed them.— Sophie