Each team gets a box of building materials and one brief: turn it into a device that uses wind power to lift a weight one metre. The catch is in the box itself. Every component carries a CO₂ footprint, so anything you add to make the structure sturdier costs you points. Building lean pays off twice over here.
As soon as the device works, the sustainability challenge starts through an app: quiz questions on sustainability and creative photo and video tasks let you offset the footprint you have run up. Finally every construction is tested and the definitive footprint is calculated: the lowest result wins. Problem-solving, creativity and strategy together decide the outcome, indoors or outdoors.
