Answer:
What's get sharp the more you use it
On what kind of ship do students study?
What gets wetter and wetter the more it dries
what has two hands but no feet
It is everything to someone, and nothing to everyone else. What is it?
Two little holes in the side of a hill. Just as you come to the cherry-red mill.
Funny
Animal
Difficult
Easy
Food
Kids
Logic
What am I?