It is, in many ways, just like thousands of other homes in Arizona’s Valley of the Sun. You punch in a four-digit code to enter a gated community. You turn right when the road forks in front of a playground. You follow a quiet, curving street until you reach the address — a one-storey, ranch-style house on a corner lot, white with brown trim. It’s not until the front door swings open that you get your first hint of what makes this place so unique.