Answer:
What kind of room has no doors or windows?
Weight in my belly, trees on my back, nails in my ribs, feet I do lack. What am I?
I've got a beautiful beautiful hall all walled in red velvet with all white armchairs made of bone and in the middle a woman dances.
I fill a room but take no space. What am I?
I run up and down the stairs without moving
What language does a billboard speak?