For capturing the air flow, we were temporarily installing a grid of balloons filled with helium in a park in Zurich 10mx10m. The question was how to explore the quality of the air outside the science center and to see what kind of learnings we could gain from the behaviour of the climate change during the day. We tried to focus as much as possible on the particularities of the wind, its direction, force and pressure, which brought the balloons into certain arrangements. Ideally, we could try out this grid as a measurement and visualizing device for micro climates in different territories.