Answer:
What has a head, a tail, is brown, and has no legs?
Only two backbones and thousands of ribs.
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.
Neither bought nor sold but more valuable than gold. It is built but not by hand. What is it?
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.