Answer:
What can be filled with empty hands?
At the sound of me, one may dream or stamp their feet, At the sound of me, one may laugh or sometimes weep.
They try to beat me, they try in vain. And when I win, I end the pain.
What gets beaten, and whipped, but never cries?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.
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?