Answer:
I am made of wood but can't be sawed? What am I?
I spend the day at the window, go to the table for meals, and hide at night. What am I?
Face with a tree skin like the sea. A great beast I am. Yet vermin frightens me.
What breaks when you say its name?
I have Eighty-eight keys but cannot open a single door.
No matter how little or how much you use me, you change me every month.