Answer:
I am an instrument capable of making numerous sound but cannot be touched or seen.
Light me up in backyard gatherings
The 8 of us go forth and back to protect our king from a foes attack
I go up when the rain comes down. What am I?
My voice is tender, my waist is slender and I'm often invited to play. Yet wherever I go, I must take my bow or else I have nothing to say. What am I?
What is always coming but never arrives?