Answer:
Until I am measured, I am not known. Yet, how you miss me when I have flown. What Am I?
What is so delicate that saying its name breaks it?
When I live I cry if you don't kill me I'll die.
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.
The faster you run, the harder it is to catch me. What am I?
What language does a billboard speak?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic