Answer:
What has a head but never weeps a bed but never sleeps can run but never walks and banks but no money?
I am useless when together but useful when I am broken apart. What am I?
I keep growing and am practically indestructible. I get eaten, but always come back. I survive cold and lie everywhere. You see me everyday. What am I?
What has four wheels and flies?
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.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.