Answer:
Take one out and scratch my head, I am now black but once was red.
Come up and let us go. Go down and here we stay
My voice is tender, my waist is slender and I'm often invited to play. Yet wherever I go, I must take my bow or else I have nothing to say.
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.
Iβm a word, six letters longΝΎ I sometimes enter with a gong. All in order from A to Z, I start with the letter B. What is the word?
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.