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.
Hard to catch, easy to hold. Can't be seen, unless it's cold
What do you throw out to use and take in when you're done?
A seed am I, three letters make my name. Take away two and I still sound the same.
Hard to catch, easy to hold. Can't be seen, unless it's cold.
What did the piece of wood say when he saw the screwdriver and screws approaching?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?