Rafael Lozano-Hemmer’s installation is the current free exhibition at the Barbican Center in London. The idea is simple - by walking down and throwing a shodow at the 90-metre long acr of the gallery you tune trough London’s radio spectrum, determining the frequenzy by the position of your shadows and the volume by the size of it. This way , the wall becomes a visuals representation of Londons radio landscape.

But for me the most interesting part of the work is the fact that kids as well as grown-ups immideatly start to play with it, just because the interface is nothing else but your shadow - no explanation needed, just interact.