The site www.langlevelater.nl serves as an interactive medium for students to playfully examine their own contribution to a healthier environment. A test with questions about living conditions, water management, landscape design in the Netherlands, horticulture, soil and food playfully touches on all aspects of the durability theme. The design game enables students to give shape to their ideal future landscape. The virtual environment of Langlevelater is Floriade 2002, the International Horticulture Exposition of the Netherlands.