Answer:
When they are caught, they are thrown away. When they escape, you itch all day.
I am slow and carry my house wherever I go but I am not a turtle. I leave a slimy trail behind me. What am I?
I have a pouch like a kangaroo but I live in trees and eat eucalyptus leaves. What am I?
A pony trots his way through the world on these.
The ones in the sea are prickly, but the ones on the street might pickpocket you.
A man goes out in heavy rain with nothing to protect him from it. His hair doesn't get wet. How does he do that?