Answer:
What force and strength cannot get through I with my unique teeth can do.
I can be written, I can be spoken, I can be exposed, I can be broken. What am I?
What goes up but never comes down?
What goes through a door but never goes in and never comes out?
What has to be broken before you can use it?
When is it bad luck to see a black cat?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic