To complement The Playground Project (from 13 July), the Bundeskunsthalle is opening the roof garden and the museum square to Outdoor, an exhibition on the subject of ‘Play’, which provides contemporary artists Nevin Aladağ, Kristina Buch, Ólafur Elíasson, Jeppe Hein, Carsten Höller, Christian Jankowski, Llobet & Pons, Michel Majerus, Andreas Schmitten, Thomas Schütte, Superflex, Rirkrit Tiravanija, Alvaro Urbano and Ina Weber with an opportunity to design interactive installations and spaces, forms and utensil for play. Visitors are invited to experience art in a playful, participatory and performative manner. According to a philosophical definition of Homo ludens, play is a primary condition of the generation of culture, because it is through play that Homo ludens, unlike Homo faber, develops his skills. It is in play as a fundamental, formative and necessary human activity that he discovers his individual qualities, and this experience allows him to develop his dormant personality. In this definition, play is equated with freedom and autonomy of mind.