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.
The person who makes me doesn't need me. The person who buys me doesn't use me. The person who uses me doesn't know it. What am I?
There was a girl half my age when I was 12, now I am 66, how old is she?
I am a word. I become longer when the third letter is removed.
I cannot be burned in fire or drowned in water
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.