Prepared for the exhibit at the UN World Urban Forum in Rio, March 2010.  Situated within the context of the exhibition hall with thousands of occupants per day, a participatory structure was developed which mapped the conception of home from a myriad sources. Each viewer was asked to take a blank card and draw what represented their home on the font side. The viewer was then asked to place their card onto a stacked system built up over the several days of the Rio exhibit: each card was cut to have slots that fit together, making a house of cards. The informal nature led to an irregular pattern of growth, mimicking the favelas in the informal settlements in Rio.