Answer:
What has wings, but can not fly. Is enclosed, but can outside also lie. Can open itself up, or close itself away. Is the place of kings and queens and doggerel of every means. What is it upon which I stand? Which can lead us to different lands.
Round like a dishpan and smaller than a bathtub. But the ocean can't fill it. What is it?
What is put on a table, cut, but never eaten?
A man is pushing his car along the road when he comes to a hotel. He shouts, "I'm bankrupt!" Why?
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.