Answer:
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.
What makes a loud noise when changing its jacket, becomes larger but weighs less?
It is able to speak because it has a hard gone. You know what it is as soon as it has sung. What is it?
At the sound of me, one may dream or stamp their feet, At the sound of me, one may laugh or sometimes weep.
How far will a blind dog walk into a forest?
You use it between your head and your toes, the more it works the thinner it grows.