Answer:
Wind and cord combine, buzzing in the box. In all this we find, though to some the use is lost. What am I?
I am perfect with a head perfect without a head; Perfect with a tail perfect without a tail; Perfect with either neither or both.
I have no head and a tail I lack but I do have arms and legs and back; I inhabit the palace the tavern the cot 'tis a beggarly residence where I am not. If a monarch were present (I tell you no fable) I still should be placed at the head of the table.
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.
I run around the streets all day. Under the bed or by the door I sit at night never alone. my tongue hangs out waiting to be fed during the day.
As round as an apple. As deep as a cup. All the king's horses can't pull it up.