Answer:
A spirited jig I dance bright, banishing all but darkest night. Air can't kill me but water can. Share me, I won't get less unless wind ruins me. What am I?
Take off my skin I won't cry but you will.
What has many teeth but can't bite?
I am easy to waste. I am unstoppable. What am I?
I can go through glass without breaking it.
I am your mother's brother's only brother in law. Who am I?