When I was little (until about eight or nine, actually, and sometimes I still believe it), EVERYTHING was alive and had feelings and stuff. I had clouds painted on my ceiling and I would make shapes out of them and give them personalities accordingly. One looked like a platypus and several were people. Some were grumpy and some were fun, and some didn't get along with each other and some were best friends, despite being on opposite sides of my cieling.
I also thought my dolls were alive (but that isn't really unusual). My favorites were (and still are) a baby doll named Abbey (she had lots of names before that, until I decided to name her after a baby in my church.) and Bunny, who is a bunny. Bunny always felt she didn't get as much attention as Abbey, so I was very careful to treat them both fairly. I think this belief came about because Bunny had a slightly squished face which always made it look like she was scowling.
There were lots of other inanimate and imaginary objects that were people. But I will never forget those clouds on my cieling, which got painted over when we moved, the poor dears.
A childhood belief about imaginary friends

others believed things like this
- i used to believe the easter bunny was my bunny that a fairy turned real.— Twix
- I used to believe that bunny rabbits hatched from eggs, since the Easter Bunny gave you eggs.— goat
- I thought the easter bunny was real— courtney
- i used to believe that bunny's could fly with their ears.Anon
- I used to believe that the Easter bunny delivered the newspaper. — Terisa
- When I was 5, I wanted to be a bunny rabbit when I grew up.— Carrie