The eco-lego House is an ecological tiny house because it is made entirely of corrugated cardboard. Zero pollution and zero waste: the cardboard of which the house is composed is totally recyclable, thus allowing to impact as little as possible on the environment. But the interesting features do not end there: the eco-lego house can be assembled in less than 24 hours. It does not need a foundation, but it is at the same time so durable that it can last for many years.