Answer:
I work when I play and play when I work. What am I?
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
I am the key that is the hardest to turn
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair.
I can make arrows fly. I can make kites soar. What am I?
I go in hard come out soft. Blow me hard and I’ll make a pop.