Answer:
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
I can be in your body but never on your placemat. I'm always better when I'm fresh, but you'll never see me in the flesh. What am I?
What has roots that nobody sees and is taller than trees. Up up up it goes and yet never grows?
What's made of water but if you put it into water it will die?
I am always running but I never get tired or hot. What am I?
I have two coins, one is marked George I and one is marked George IV. One is genuine but one is a forgery. Which is the forgery?