The Erfahrungsfeld zur Entfaltung der Sinne (English: Field of experiences for the development of the senses) is an interactive exhibition that stimulates all the senses, designed by Hugo Kükelhaus. The different exhibits are intended to inspire the visitor to experiment with them, to explore them, like in a park of the senses or a science center. Kükelhaus constructed 32 pieces of playground equipment for schools in the city of Dortmund and demonstrated some of these equipment at the Expo 67 world exhibition in Montreal. His holistic concept for a large open-air exhibition was shown in the exhibition Phenomena, shown in Rotterdam, South Africa, and Bietigheim, among others.