Answer:
What do you call a fish with no eye?
I am like thunder in your cranium
Use me if you really want to see inside someone
I am a little piece of paper, yet sometimes hold lots of value. I am all you need to get into big events, but will cost you. I am an important part of travel. And if lost, you're not coming. What am I?
I am the kind of a tree that is carried in your hand. What am I?
Give it food and it will live, give it water and it will die.