Answer:
Though easy to spot, when allowed to plume, It is hard to see, when held in a room.
A nut cracker up in a tree.
What grows in winter, dies in summer, and grows roots upward?
Two brothers we are, great burdens we bear. All day we are bitterly pressed. Yet this I will say, we are full all the day, and empty when go to rest.
Two in a whole and four in a pair. And six in a trio you see. And eight's a quartet but what you must get. Is the name that fits just one of me?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.