Answer:
I tremble at each breath of air, and yet can heaviest burdens bear.
Thousands lay up gold within this house, But no man made it. Spears past counting guard this house, But no man wards it.
Thirty white horses on a red hill, first they champ, then they stamp, then they stand still.
Turns us on our backs, and open up our stomachs. You will be the wisest of men though at start a lummox.
Sharp and long, flag of the world. What is it?
What is lighter than what it is made of?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?