Answer:
In the land of the green glass door there are riddles but no answers, sheets but no blankets, and books but no words. Name something found in the land of the green glass door.
Describes a mysterious region and a stylish pair of shorts.
What an fill a room but takes up no space?
What is lighter than what it is made of?
What relies on columns but isn't a house, and asks for help but can't speak itself?
You use it between your head and your toes, the more it works the thinner it grows.