Answer:
I always run but never walk, I sometimes sing but cannot talk, No head on which a hat to place, You always look me in the face.
What kind of room has no windows or doors?
I have it, I don’t share it. If I share it, I don’t have it. What is it?
What can be swallowed, but can swallow you?
I sleep by day, I fly by night. I have no feathers to aid my flight.
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?