Answer:
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.
What can touch someone once and last them a life time?
What goes up but never comes down?
My first keeps time, my second spends time, my whole tells time.
What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements?
What covers its face with its hands, speaks no language, yet most known what it's saying?