Architecture, Building and Structure Design Farming Kindergarten by VTN Architects The kindergarten is constructed for 500 pre-school children of Taiwanese shoes factory in Vietnam to provide a sustainable education for their staff's children. The green roof is a triple-ring-shape drawn with a single stroke; creating 3 courtyards as safe playground. Passive design methods are comprehensively applied in the building together with Farming on roof. The kindergarten provides an experimental learning space for future generation of a developing county. The building concept is able to be a model of educational facility of developing countries.