In the house I grew up in, there was a grate in the front yard, and I used to think that dolphins lived down there (because I was told alligators lived in sewers). So I took it upon myself the responsibility to 'feed' the 'dolphins' with leaves and garbage and "berries" I found in my neighbour's backyard. I also thought it would be nice for me to talk to them once in awhile so they could have some company.
Then I found out alligators don't live in sewers, either.
That's when I gave up on the dolphins.
A childhood belief about general

others believed things like this
- I used to believe there really was alligators in the sewers— Makron
- I used to believe the dolphins speak in spanish.— Cristian from Colombia
- I used to think that sharks were dolphins who were really mean on steroids and ridiculous stuff like that.— Tyler Leber
- I used to believe that water towers were detention centres for naughty dolphins— Ian
- I believed alligators lived in toilets, and one apparently got hold of my sister.Anon
- I had alligators and cartoon lions under my bed.— ruth