This probably isn't what you are looking far but I can't resist sharing. Several years ago at a hands on workshop we were presented with a problem. The problem: Move a goat, wolf and cabbage across a river in a boat without anything getting eaten. In the workshop we roll played the parts and used a length of yarn for the river. A cat was the boat driver so the person playing the cat escorted us back and forth across the river until we eventually figured it out. If I remember correctly. I was the cabbage.