Answer:
What flies forever, Rests never?
If I have it, I don't share it. If I share it, I don't have it. 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.
My voice is tender, my waist is slender and I'm often invited to play. Yet wherever I go, I must take my bow or else I have nothing to say.
What goes through the door without pinching itself? What sits on the stove without burning itself? What sits on the table and is not ashamed?
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?