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.
Pregnant every time you see her, yet she never will give birth.
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard.
A type of hammer that brings a room to order.
The person who makes it has no need for it. The person who purchases it does not use it. The person who does use it does not know he or she is. What is it?
What language does a billboard speak?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?