#ChicagoBiennial participants RUA Arquitetos, established by Pedro Évora @pedroevora and Pedro Rivera @pedroriv in Rio de Janeiro, is a small architecture company oriented towards innovative solutions for the spatial design. For the MoMA @themuseumofmodernart exhibition "Uneven Growth: Tactical Urbanisms for Expanding Megacities," RUA looked at their home city of Rio, which still suffers from a challenging topography of wealth and class, despite the rise of the middle class in Brazil's burgeoning economies. Working with MAS Urban Design, the architects proposed "Varanda Products," a line of do-it-yourself construction kits aimed at making sustainable design more compelling. The sketch above shows these easy-to-assemble kits at work, such as the Papaya Umbrella, a playful rainwater collection system (seen at top right). "Any person can download and build these products by themselves," says Evora. "The idea is to promote a space for ideas. Almost a third of the city was built informally, built by the people. This is part of the culture."