Pareid, an architecture studio, and students of the Chulalongkorn University in Bangkok, Thailand, have designed and constructed a brightly coloured open-walled classroom called Polynsque that harvests rainwater. The structure has two funnels on the roof that direct rainwater to underground storage containers. The underground water can be pushed back into water tanks via machines. The school has been constructed in a rural part of Thailand where water supply is scarce. The school is built on a simple steel frame. The metal bars of the structure can be easily moved, placed and welded. The roof with the rainwater harvesting facility was created to make school students aware of the importance of water. The open classroom has been painted in red and purple to give it a unique identity and help it stand out from its green surroundings.