I had my imaginary friends and sisters when I was much older than most kids are when they have them. I was about 9-12 when mine were developed. I convinced people that I was a triplet. My sisters names were Leigh and Sonya. I dropped Sonya after a while and just had Leigh. Sometimes I was Leigh and sometimes I am me. I also had a "imaginary" brother named Toby and he saved my life a lot. My bestest friend was Kenzi, and I actually tried to set Kenzi up on dates and drew pics of her. I'm 27 now and I still have Kenzi around. I actually made a myspace for her and we talked back and forth. Every year, every few months or so, my daughter (7) and I have a birthday party for our imaginary friends (i didn't tell her about mine, she just had them one day at around 3 years old.) We make a cake on the special day and make cards and make presents and take pictures. I should post them up somewhere.
A childhood belief about imaginary friends

others believed things like this
- I used to have an imaginary friend named Mr. Nobody. He would protect me from my imaginary enemy, Bad Elmer.— Kdees
- when i was growing up i had two imaginary friends. One was named Jennifer, the other was named Onion.— Tessica
- I remember once a friend of mine told me that when ever you hold in your pee it would make your balls stronger— Zao
- A friend on mine thought that smoking menthal cigarettes would make his breath minty fresh.Anon
- I used to believe that my sisters "make believe dog" was real— me
- When I was six I had an imaginary friend named Binky. When I was seven my dad ran over Binky with the car.— Shadia Granger-Malfoy