Answer:
I am a ship that can be made to ride the greatest waves. I am not built by tool, but built by hearts and minds. What am I?
I start with T end with T and within me is T.
Two in a whole and four in a pair. Six in a trio you see. Eight's a quartet but what you must get is the name that fits just one of me.
What can be cracked before it's used?
Use me if you really want to see inside someone
A little house full of meat, no door to go in and eat.