Answer:
Different lights do make me strange, thus into different sizes I will change
What I am filled, I can point the way. When I am empty. Nothing moves me. I have two skins. One without and one within.
It is worldwide, but once only a spider could weave one
A man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?
A house full, a yard full, a chimney full, no one can get a spoonful.
What covers its face with its hands, speaks no language, yet most known what it's saying?