Answer:
I open wide and tight I shut, Sharp am I and paper-cut fingers too, so do take care, I'm good and bad, so best beware.
You eat something you neither plant nor plow. It is the son of water, but if water touches it, it dies.
As round as an apple. As deep as a cup. All the king's horses can't pull it up.
A time when they're green. A time when they're brown. But both of these times, cause me to frown. But just in between, for a very short while. They're perfect and yellow. And cause me to smile.
What is the thing that stays the same size, but the more it's used the more it decreases?
I can only be played on a windy day
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?