Answer:
I am an instrument capable of making numerous sounds but cannot be touched or seen. What am I?
What has to be broken before you can use it?
Sometimes I annoy you, sometimes you can't live without me. But no matter how hard you try, you can't destroy me. What am I?
What can travel around the world while staying in a corner?
I have a head, tail, but no arms and legs. What am I?
No matter how little or how much you use me, you change me every month.