Answer:
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.
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around
You need a key to receive an answer from me. The answer you'll find is straight from your mind. What is it?
You'll see savory dishes in Hong Kong sizzling in these.
Bury deep, Pile on stones, My mind will always Dig up them bones
What covers its face with its hands, speaks no language, yet most known what it's saying?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?