Answer:
What has a head but never weeps a bed but never sleeps can run but never walks and banks but no money?
There's a one-story house in which everything is green. Green walls green windows green doors. What color are the stairs?
You use me between your head and your toes the more I work the thinner I grow.
I am a cave full of bones and the house of a worm.
I'm not a bird, but I can fly through the sky. I'm not a river, but I'm full of water. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.