Answer:
How can you throw a ball 20 meters, and have it come back to you without hitting anything?
What is the difference between yesterday and tomorrow?
What always comes into a house through the keyhole?
On Christmas eve, when Santa leaves his workshop on the north pole, what direction does he travel.
What can you fill a room with that takes up no space?
What goes around and around the wood, but never goes into the wood?
Logic
Animal
Difficult
Easy
Food
Funny
Kids
What am I?