Answer:
I am of several different kinds, but the one you pick doesn't do its job. What am I?
What has many teeth but can't bite?
I fly when I'm on and float coming off.
I am always running but I never get tired or hot. What am I?
I go up and never come down no matter how hard you wish. As I get higher more wrinkles crawl onto your face.
What did the piece of wood say when he saw the screwdriver and screws approaching?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic