Answer:
Lighter than what I am made of, More of me is hidden Than is seen.
Thousands lay up gold within this house, But no man made it. Spears past counting guard this house, But no man wards it.
Autumn leaves and bad bowlers wreak havoc on this
A precious stone, as clear as diamond. Seek it out while the sun's near the horizon. Though you can walk on water with its power, try to keep it, and it'll vanish in an hour.
Flat as a leaf, round as a ring. Has two eyes, can't see a thing.
I am your mother's brother's only brother in law. Who am I?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?