Answer:
The more that there is of this, the less you see. What is it?
On Christmas eve, when Santa leaves his workshop on the north pole, what direction does he travel.
How do you discover something that does not exist?
What is as big as you are and yet does not weigh anything?
What is the only question you can't answer yes to?
I stand in one place yet fill the whole room. I can be filled with molten rock and come in every hue. What am I?