The grounds of the Blickfelder Festival are outdoors at the so-called Turbinenplatz directly behind the Zurich Schiffbau. Despite the festival, not many people are out and about here on this Sunday. A place in the shade seems more desirable to most than participating in an urban space project that leads up and down the Zurich hills in the scorching heat. “You’ll pass two fountains, take enough water with you anyway!” is the instruction. And off we go on an audio- and video-controlled scavenger hunt that infamously leads twice along the Limmat, where half of Zurich is cooling off in the river. “Vier Viertel” is about the world of experience of children from four different districts of Zurich and at the same time serves as preparation for “Fundstadt”, i.e. the NOperas! project that will be performed in Gelsenkirchen and Bremen next summer. For their audio-and-video walk, HIATUS have invented an audiovisual guidance system that will also be used later in “Fundstadt”. At first I’m annoyed by how complicated it is to put on the whole outfit: a combination of tablet, headphones, cape and hood. Then I quickly begin to realise how sophisticated it is. On this day, the hood protects me not from rain, but from heatstroke. When it comes to crossing streets, the tablet tells me to take off my headphones. I meet four Zurich children on the way through the four Zurich districts. Hear their voices. Hear their music. I see them appear as ghostly figures on the tablet in the very scenery where I am stopping. Four quarters, that means about an hour’s walk through different Zurich milieus. Does it seem to me, wrongly, that even the two toughest girls in Zurich’s Wunderland lead a more suspended life than perhaps some girls in Gelsenkirchen? “Vier Viertel” is a nice and inspiring starting point for thinking about and further discussing “Fundstadt”, a project that, unlike the one in Zurich, is also to include live-action theatre. Gelsenkirchen and Bremen are to be short-circuited with each other. But how do you show Gelsenkirchen in Bremen and vice versa? And how can one at the same time stick to showing the children in “their” milieu? What takes the place of the lonely Zurich scavenger hunt adventure when whole groups of visitors are sent on their way together in “Fundstadt”? We are still at the very beginning with “Fundstadt”.