Day1 Machiel and Hayo preparing the 'Wow!' installation. At night. On the Roof. Yeah.

Wow! is a physical-digital graffiti wall you can draw on using the light from your cell phone, cigarette bud etc. It was developed during Dev Camp '10 by Mark Wubben, Dirk van Oosterbosch, Eelco Wagenaar and Marie-Anne Huiskamp.