Answer:
What is it that was given to you, belongs only to you. And yet your friends use it more than you do?
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
Inside a great blue castle lives a shy young maid. She blushes in the morning and comes not out at night.
Turn us on our backs and open up our stomachs you will be the wisest of men though at start a lummox.
You eat something you neither plant nor plow. It is the son of water, but if water touches it, it dies.
What is so fragile that saying its name breaks it?