First we conceptualized a Green house, like a giant doll house with parts that opened, closed, switched on and off. While exploring the house, tidbits of friendly information and tips would be revealed, like how much $$ one might save per year if you switched all your light bulbs from incandescents to compact fluorescents. You could open the garage and voila, a hybrid vehicle. On the roof, solar panels.
When it was apparent that floor space was limited, the design became 2 dimensional; like an advent calendar where kids could search for flaps that opened and provided info. Home technology was to be emphasized, like low-flow shower heads, energystar approved appliances, etc.
Finally, the design was overtaken by the outside design company, and they created a 2D house with rotating panels that revealed information as one manually turned the wheel-like device. The bright windows you see in the photo demonstrate the heat lost (energy wasted) by incandescent lights compared to fluorescent; place your hand on the window and glass and literally feel the heat.