When my mother was pregnant with my little sister (I was 5) I thought the "baby inside of Mommy" was a little doll sized version of a 5 year old kid and my mother's swollen belly was a little two story doll house inside with wallpaper and doll furniture and the whole bit.
A childhood belief about reproduction

others believed things like this
- My Sister Once Said That Polly Pocket Was A Real Girl That Got Shrunk To Doll Size And Turned Into A Doll.— Jamie
- I thought that my Sheriff Woody doll could protect me if I was home alone.Anon
- i thought that if i dressed in my holly hobby doll's clothes, no one would be able to find me.— pikl
- I used to believe that my doll Kimberly was real and if I listened carefully, that I'd hear her speak!— Kristy
- When I was younger I cut my Barbie doll's hair and wondered why it never grew back.Anon
- I used to think that if i touched my belly button it would unfold and my belly would be inside out forever. Anon