The Smart Citizen Kit was devised out of growing concerns of citizens about the quality of their air. The difference between this Kit and other measuring tools is the active involvement of ‘ordinary people’ in the measuring process. In this project, Waag Society and Amsterdam Smart City want to install a network of sensors all through Amsterdam. The Kit can measure humidity, noise pollution, temperature, CO, NO2 and light intensity. Participants fasten the Kit somewhere outside their house, e.g. outside their window, or on their balcony. The Kit takes measurements and conveys the results though the internet connection of the participant.