When I was about 4 I had an invisible friend, Oscar, who was my "invisible pet octopus". Oscar would tell me what I should eat or whether or not I should do things - "No, Oscar says that I shouldn't eat those vegetables" or "Oscar said I don't have to go to bed now". I was an only child so it was nice to have this friend. My mother says she wasn't overly fond of Oscar, and I don't know why I decided upon an octopus.
I did try for a bit in kindergarten to convince people that this big tall blow up doll I had (NO!! Not that kinda blow up doll!) was my sister, who was very quiet except for a squeak when she was bent. I always wanted siblings, I guess.
A childhood belief about imaginary friends

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
- Yesterday I realised that invisible ink doesn`t make me invisible.— Jonathan Eleven years old
- that pickles were octopus legsAnon
- I used to think that 'testicles' was the word for the arms of a squid or an octopus. — Emily
- I used to think that if you didn't blow your nose and just sniffed the snot up, you head would blow up.Anon
- My uncle convinced me that if you ate octopus, the suckers on the tentacles would suck your tongue out— Minnie