Answer:
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair.
I take off my clothes when you put on your clothes. I put on my clothes when you take off your clothes
I am of several different kinds, but the one you pick doesn't do its job. What am I?
I am ten little beans your look at everyday.
I'm not a bird but I can fly through the sky. I'm not a river but I'm full of water.
What never gets any wetter no matter how hard it rains?