Answer:
What flies forever, Rests never?
I wear a red robe, with staff in hand, and a stone in my throat.
They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own.
I cannot be felt, seen or touched. Yet I can be found in everybody. My existence is always in debate. Yet I have my own style of music.
Crooked as a rainbow, and slick as a plate, Ten thousand horses can't pull it straight.
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?