Playground to the sky

Farming Kindergarten in Dongnai

Facing the changes

Vietnam, historically an agricultural country, is facing changes as it moves to a manufacturing based economy, taking its toll on the environment. Increased droughts, floods and salinization jeopardize food supplies, while numerous motorbikes cause daily congestion and air pollution in the cities. Rapid urbanization deprives Vietnamese children of green lands and playgrounds, thus relationship with nature.

Farming Kindergarten is a challenge to counter these issues. Located next to a big shoe factory, and designed for 500 (!) children of the factory’s workers, the building is conceived as a continuous green roof, providing food and agriculture experience to children, as well as an extensive playground to the sky.

The green roof is a triple-ring shape drawn with a single stroke, encircling three courtyards inside as safe playgrounds. Recently, an experimental vegetable garden was realized on its top. Five different vegetables are planted in 200m² garden for agriculturural education.

All functions are accommodated under this roof. As the roof lowers to the courtyard, it provides access to the upper level and vegetable gardens on top – the place where children learn the importance of agriculture and recover connection to nature.


VTN Architects (Vo Trong Nghia Architects)
2F, VN steel building
91 Lang Ha, Dong Da
Tel/fax: +84-4-3736-8536


Principal architects: Vo Trong Nghia, Takashi Niwa, Masaaki Iwamoto
Architects: Tran Thi Hang, Kuniko Onishi

Green building consultant: Melissa Merryweather
CFD analysis: Environment Simulation Inc.


Pou Chen Vietnam
Dongnai Farming Kindergarten, © Hiroyuki Oki
Dongnai Farming Kindergarten, © Hiroyuki Oki

Environmental strategies

The building is made of a continuous narrow strip with two side operable windows which maximize the cross ventilation and natural lighting. Additionally, architectural and mechanical energy-saving methods are comprehensively applied including but not limited to: green roof as insulation, green facade as shading and solar water heating. These devices are designed visibly and play an important role in the children’s sustainable education. Factory wastewater are recycled to irrigate greenery and flush toilets.

As a result, the kindergarten is operated without air conditioners in the classrooms despite being located in a harsh tropical climate. According to post-occupancy record issued ten months after completion, the building saves 25% of energy and 40% of fresh water compared to baseline building performance, reducing its running cost greatly.




Opening date



The building is designed for low-income factory workers’ children; therefore construction budget is quite limited. The combination of local materials (ex. bricks, tiles) and low-tech construction methods are applied, which also help minimize the environmental impact as well as promote local industry. Thanks to simple rigid frame with economical materials, the construction cost per one square meter is only 500 USD including finishes and equipment, which is competitively cheap even within the Vietnamese market.

Author of text

VPN Architects


Hiroyuki Oki
Gremsy (Aerials)

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