Answer:
Which bank is not used for storing money?
What can you fill a room with that takes up no space?
On Christmas eve, when Santa leaves his workshop on the north pole, what direction does he travel.
How can you throw a ball 20 meters, and have it come back to you without hitting anything?
When you put this in a heavy wooden box the box will become lighter
What goes around and around the wood, but never goes into the wood?