Pupils in class 5c of the Otto-Wels-Primary School asked themselves the question what playing in public space means today. They were guided in the URBAN NATION Museum's mediation project by the art mediator and photographer Markus Georg. A selection of the photographs can now be seen in an outdoor exhibition from November 27, 2020, to January 31, 2021, around Kastanienplatz, at the Wassertorplatz district of Kreuzberg. The concept of "Spiel-Strasse" was developed as part of the current exhibition Martha Cooper: Taking Pictures at the URBAN NATION Museum. The exhibition does not take place at the museum, but around the Kastanienplatz.