Answer:
When it was young, it had a tail. When it grew up, it had knees
A horrid monster hides from the day, with many legs and many eyes. With silver chains it catches prey. And eats it all before it dies. Yet in every cottage does it stay. And every castle beneath the sky.
I live in the desert and have humps to store water. What am I?
I have a pouch on my belly where I carry my babies. I hop around Australia. What am I?
I can 'fly' underwater and have eight arms. What am I?
I flow from the Homerβs mouth when he sees doughnuts.