Answer:
What is it that no man ever saw, which never was, but always will be?
What goes up and down without moving?
Sitting down you have it, Standing up you don't.
What cleans as it gets dirty only to get clean the more you use it?
You are on an electric train. Which direction will the smoke fly in?
How did the farmer find his wife?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?