Answer:
By Moon or by Sun, I shall be found. Yet, if there's no light around, I am undone. What am I?
I always follow you around, everywhere you go at night. I look very bright to people, but I can make the sun dark. What am I?
If you're looking for something sweet I know what to do. But if you don't like heat I'm not for you.
I shrink smaller every time I take a bath.
I always have to work with something in my eye.
What is lighter than what it is made of?