Answer:
Come up and let us go. Go down and here we stay.
The older they are the less wrinkles they have.
The more of them you take, the more you leave behind. What are they?
They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own. What are they?
A box without hinges, lock or key, yet golden treasure lies within.
I have two eyes in the front and a lot of eyes on my tail