Answer:
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
I hide but my head is outside.
When liquid splashes me, none seeps through. When I am moved a lot, liquid I spew. When I am hit, color I change. And color, I come in quite a range. What I cover is very complex, and I am very easy to flex.
A hill full, a hole full, yet you cannot catch a bowl full.
In your fire you hear me scream, creaking and whining, yet I am dead before you lay me in your hearth.
Why was the cook arrested?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?