Answer:
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
They made me a mouth, but didn't give me breath. Water gives me life, but the sun brings me death.
Vikings use this for warmth.
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
I can be used to type and point you see. But don't forget, you can count on me. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?