I'm not sure where I got this from, but when I was little I believed that kangaroo pouches were filled with sticky purple gel.
A childhood belief about general

others believed things like this
- Abba - Happy New Year
"Kangaroo year,
Kangaroo year..."— Santa Puncher - My brothers friend still thinks he will be a kangaroo when he grows up and he's 9!!!!!— Jane Rom
- I used to believe that as I ate food, I filled up, and that once I filled up completely, I would die. Anon
- My older brother once told me that Aussie shampoo was made from kangaroo pee. I avoided using it for years!— Annie
- My grandpa told me when I was little that if you swallow chewing gum your butt will be sticky— Lili
- When I was little, my dad told me that if you pee in the pool the water will turn purpleAnon