When I was about 6 or 7 I was visiting with my Grandparents and was bored, so I imagined that the cartoon strip character Hagar the Horrible was living with his friends in the breezeblocks in the backgarden.
When it was time for me to go I invited them all to come home with me. I remember that they always marched in one long line and were about three inches tall. I used to build houses for them out of cards and leave my bedroom door open a crack so that they could come and go.
A childhood belief about imaginary friends

others believed things like this
- I thought if I left the door open too long, a dog would come from the cupboard in the washroom and eat me
Anon - When I was little i thought grandparents had to be hundreds of meters tall... Anon
- i used to think water towers were houses for really tall people. I thought they had big heads to.— Alyssa
- I thought cartoons were real, I remember asking my mom why there were lines around the "actors" in a cartoon.— Steven Graziano
- when i was little i thought that toys had parties wee little partys when you would leave home— Dominique Tello
- I used to think that board games were called bored games because you play them when you're bored.Anon