For Leaders
You need a space rover (this can be a drinks bottle with some water or sand in) and a rubber band (that is small enough and strong enough to grip around the bottle) with 4 ropes attached to it. Marking out a large square on the ground, stand the space rover on the floor outside the square. In groups of 4, each person must hold and control 1 rope and together the group must use the rubber band to grip around and pick up the space rover and safely land it in the centre of the square.