Answer:
What room do ghosts avoid?
I can be entertaining until you realize some pieces have been lost.
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
Why is it so easy to weigh fish?
What is black when you buy it red when you use it and gray when you throw it away?
What never gets any wetter no matter how hard it rains?