Answer:
I run smoother than any rhyme I love to fall but cannot climb.
A spirited jig I dance bright, banishing all but darkest night. Air can't kill me but water can. Share me, I won't get less unless wind ruins me. What am I?
I am lighter than the material I am made of. You see parts of me but more of me is hidden underneath.
you can throw me away but I will always be coming back
I can be driven but have no wheels. I can be sliced but still remains whole
Two brothers we are, great burdens we bear. All day we are bitterly pressed. Yet this I will say, we are full all the day, and empty when go to rest.