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.
Thousands lay up gold within this house, But no man made it. Spears past counting guard this house, But no man wards it.
Goes over all the hills and hollows. Bites hard, but never swallows.
What word is a plural, but when you add an "S" to the end, it becomes singular?
I am seen in the water. If seen in the sky, I am in the rainbow, a jay's feather, and lapis lazuli.
Break me and I am better immediately set and harder to be broken again.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?