Answer:
You can tumble in it, roll in it, burn it, animal eat it. Used to cover floors, still used beyond stall doors. Freshens whatever it is placed on. Absorbs whatever is poured into it.
Who lives in a house with one bedroom, 50 hallways, and ghosts lurking everywhere?
It stands upright and can be quite grand. Its secret is not hidden but right at hand. What is it?
They try to beat me, they try in vain. And when I win, I end the pain.
You can see nothing else, When you look in my face, I will look you in the eye, And I will never lie.
I am your mother's brother's only brother in law. Who am I?