"Conceptos Plásticos works with local communities to source plastic and rubber and train locals on the building process. With the building blocks, locals can build their own houses, emergency shelters, community halls, and classrooms. A home for one family will take four people five days to construct with the recycled building blocks – and there’s no construction experience necessary. The blocks fit together like LEGOs."
For more information, visit the design firm's website: http://conceptosplasticos.com
I recommend a translation extension for the page if you don't speak Spanish.