Answer:
What goes through towns and over hills but never moves?
I have 24 keys but cannot open any locks. Sometimes loud, sometimes soft. What am I?
I am bought by the yard but worn by the foot
I open to close but I close to open. I'm surrounded by water but I'm never soaking. What am I?
The dirtier I get, the whiter I am. What am I?
I am your mother's brother's only brother in law. Who am I?