Answer:
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help. Yet many people are afraid to let me help them.
I am a fire's best friend. When fat, my body fills with wind. When pushed to thin, through my nose I blow. Then you can watch the embers glow.
What has six faces, But does not wear makeup. It also has twenty-one eyes, But cannot see?
When does Christmas come before Thanksgiving?
A hill full, a hole full; yet you cannot catch a bowl full. What is it?
What did the piece of wood say when he saw the screwdriver and screws approaching?