I used to believe that my parents would pray to God if they wanted a baby, and the next day, he or she would be born. I think I was 12 before I realized this wasn't how babies were born. :)
A childhood belief about reproduction

others believed things like this
- That babies were born with clothes on - I once asked my mum where the clothes I was born in were =]— Liadhain
- I used to believe that babies were born out our bellybuttons.Anon
- I don't know why, but I used to believe that babies were one year old when they were born o_O.Anon
- I used to believe that babies were born through the mom's mouth.
Don't know how I came up with that. — Makenna - I used to believe babies were born with clothes onAnon
- I used to believe babies were 9 months old when they were bornAnon