Not my belief excactly, but we have a factory right outside town that makes mattresses, and they have a green kangaroo for a logo.
As we were growing up, my friend was convinced that's where they made kangaroos.
A childhood belief about general

others believed things like this
- I used to believe that clouds were made from a factory chimney that was south of my home town. — bynbyn
- I used to think that adult kangaroos were called Kangas and that child kangaroos were called Roos. Anon
- My brothers friend still thinks he will be a kangaroo when he grows up and he's 9!!!!!— Jane Rom
- When I was little, I believed that my Dad worked in a factory where they painted peas green!— Hannah G.
- My older brother once told me that Aussie shampoo was made from kangaroo pee. I avoided using it for years!— Annie
- I used to think that eggs were made in a factory. The oval shell made them fit perfectly in the egg cartons.— Sherry