Answer:
I can be as thin as a picture frame but my insides have many things you can see.
What word becomes smaller when you add 2 letters to it?
Passed from father to son and shared between brothers, its importance is unquestioned though it is used more by others.
What is always coming but never arrives?
Even if you throw it away, it still comes back.
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?