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.
What is as big as you are and yet does not weight anything?
What goes up but never comes down?
Forward Iām heavy, but backwards Iām not.
What number has all letters in alphabetical order when spelled out?
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?