Answer:
What can speak without a tongue and listen without ears?
Come up and we go, Go down and we stay.
What is used by man, tossed by trees, everywhere but unseen?
Tickle with your fingers and a song it will sing. Be careful, though, you may break a string. What is it?
I start in little but I end in full, you'll find me in half and complete.
It is something you will never see again.