Answer:
By Moon or by Sun, I shall be found. Yet, if there's no light around, I am undone. What am I?
What is made of wood, but can't be sawed?
I have four fingers and a thumb, but I'm not living. What am I?
Lighter than what I am made of. More of me is hidden than seen. What am I?
The more of me there is the less you see.
What is always coming but never arrives?