Color Changing Paint

I need to get a bunch of that stuff and re-paint the outside of my house with it. Maybe bright pink when it is cold and neon green when it is hot...that would give the neighbors something to talk about.
Actually, now that I think about it color changing paint could help make a home more energy efficient. Like maybe having the house turn white when it's hot out (to reflect heat) and black when it's cold (to absorb heat from sunlight).
Anyway, cool stuff regardless.













