Answer:
A caribbean shape that makes ships disappear.
I am needed for most animals and hardcover books
If you look, you cannot see me. And if you see me, you cannot see anything else. I can make anything you want happen, but later everything goes back to normal. What am I?
I am quick when I'm thin. I am slow when I'm fat. Wind is my worst nightmare. What am I?
I can be repeated but rarely in the same way. I can't be changed but can be rewritten. I can be passed down but should not be forgotten.
It comes from crystal and melts to a treat. Add it to your tea to make it sweet. What is it?