Traditional Riddles

I am taken from a mine, and shut up in a wooden case, from which I am never released, and yet I am used by almost everybody.

What is it that you can keep after giving it to someone else?	Answer
What walks all day on its head?	Answer
What gets wet when drying?	Answer
What comes once in a minute, twice in a moment, but never in a thousand years?	Answer

Circle of Life, Happiness and Love