Answer:
I have a neck and no head two arms but no hands. I go with you to school I go with you to work.
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. Sooner or later everybody needs my help yet many people are afraid to let me help them.
What runs around the whole yard without moving?
What seven letter word has hundreds of letters in it?
What type of shoes do spies wear?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.