Its called the TomaHouse by TomaTech and its really an awesome little prefab. The TomaHouse is a high-tech modular prefab building that can be tweaked to fit a number of situations or environments. Each prefab basically starts off with a basic four-meter by four-meter square floor plan. Based on what you want or what your needs are, you can customize from there. These prefabs have a strong aluminum frame with easy to assemble locking joints making it "...simple enough for a child to assemble yet robust enough to withstand extremes of external pressure."