Answer:
Neither bought nor sold but more valuable than gold. It is built but not by hand. What is it?
What kind of nut is empty at the center and has no shell.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.
What can be swallowed, But can also swallow you?
A type of hammer that brings a room to order.
People take me on walks and I run and have fun. What am I?