Sustainability is a crucial goal around the world today, but the people of Germany have been keen on the concept for centuries, living by eco-friendly principles since the early 1700s. At Campus Germany, the country’s massive university-themed pavilion at Expo 2020, hundreds of hands-on educational experiences combine to provide an entertaining course in sustainability. Lectures and pop quizzes have no place on this campus, though. The pavilion’s lessons unfold on dynamic digital blackboards, inside giant selfie-friendly ball pits, and across “labs” that feature inventive explorations of our shared sustainable future. It’s all capped with a fun “graduation” ceremony in unique swinging seats.