Jungle Gym This is the simplest game there is. All you do is turn your body into a ratty jungle gym. Set yourself out in the play room, and pose yourself in different positions. Your rats will love climbing, up, over, and around you. Be prepared for them to do some shirt diving, though! They love to burrow into people's clothes! You can lay on your back, or on your stomach, sit, crouch, put your feet up on the walls, any new position you can think of. Our rats' favorite, is when we are on our hands and knees, and crouch low to the floor.