Answer:
I am an instrument capable of making numerous sounds but cannot be touched or seen. What am I?
I stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
I run up and down the stairs without moving
You see a boat filled with people. It has not sunk but when you look again you don't see a single person on the boat. Why?
What goes through towns and over hills but never moves?
I am your mother's brother's only brother in law. Who am I?