This is the only tracked robot in the range which allows it to go places the others cannot. He is designed to work with another Sumo Man in a sumo-style pushing match, but he has movement of his arms to assist in the game. To find his opponent he has an Infrared light sensor which detects IR from the other sumo robot(s) and can move toward it or away from it depending on the mode switch setting. This means that a group of Sumo Men can have a combination of seeking action and avoiding action to liven up the game. Fun aside however, these robots give a good opportunity to learn about interactive group action in robots which is brought about by one of two simple behaviours in different individuals of the same group Even on its own Sumo Man is an interesting robot.