Answer:
What runs around the whole yard without moving?
The person who makes it sells it. The person who buys it never uses it. The person who uses it never sees it. What is it?
I'm as simple as a circle worthless as a leader; but when I follow a group their strength increases tenfold. By myself I'm practically nothing.
I am carried by mad animals.
I have cities without people forests without trees and oceans without water. What am I?
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive!