Answer:
I love spinach.
You see a boat filled with people. It has not sunk but when you look again you don't see a single person on the boat. Why?
Lighter than what I am made of. More of me is hidden than seen. What am I?
I am a cold man without a soul. If there is warmth in me, it slowly will kill me. What am I?
I am a ship that can be made to ride the greatest waves. I am not built by objects, but built by minds. What am I?
I am your mother's brother's only brother in law. Who am I?