Answer:
Flat as a leaf, round as a ring; have two eyes, can't see a thing. What am I?
I go around in circles, but always straight ahead. Never complain, no matter where I am led. What am I?
I am the building with the most number of stories. What am I?
What is black when you buy it, red when you use it, and gray when you throw it away?
What can be drawn but never taken?
Why is the letter B always cool?