Answer:
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
A box without hinges, lock or key, yet golden treasure lies within.
I can sizzle like bacon, I am made with an egg. I have plenty of backbone, but lack a good leg. I peel layers like onions, but still remain whole. I can be long, like a flagpole, yet fit in a hole.
Bury deep, Pile on stones, My mind will always Dig up them bones
What has roots as nobody sees, is taller than trees. Up, up it goes, and yet never grows?
Brings the sky a lot closer.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?