The prestigious Internationale Bauausstellung (IBA) has set up shop in Wilhelmsburg, a district in the south of Hamburg that struggles with the legacy of its heavy industrial history. The main theme that IBA applies to Wilhelmsburg is the shift in the way Germany wants to manage energy — a shift from energy consumption to energy production. As always, this big ambition is connected with innovation in building techniques and architecture, but also with culture, experience and just fun. These last elements in particular make this piece of urbanism stand out. A playground for city-makers will eventually turn into a playground for everyone.