One unique feature of this “large house,” for example, is that a 3-year old child is in the same room as a 5-year old and these children of different ages can interact in the wide, one-room space. Additionally, should a 3 year-old child be sleeping while a 5 year old child plays nearby, these differences in rhythm reinforce the "domestic" qualities of this "large house." Keeping in line with Seiyu-kai's longstanding (26-year) philosophy, we made it a priority to minimize the number of blind-spots within the room in order to keep safety measures as unintrusive as possible.