Answer:
A house of wood in a hidden place. Built without nails or glue. High above the earthen ground. It holds pale gems of blue.
What stays on the ground but never gets dirty?
Two people are born at the same moment, but they don't have the same birthdays. How could this be?
I can run but not walk. Wherever I go, thought follows close behind.
Who is he that runs without a leg. And his house on his back?
What never gets any wetter no matter how hard it rains?