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.
My tongue hangs out as I run over fields and streets all day. I get tied up every morning and untied at night.
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
I have two hands but cannot clap
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
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?