I wish I could do this. Decorations wouldn't hold up very well in a Calgarian winter.
I was in Arizona, visiting my family, and told my cousins how much I loved this trend. Sure enough, while my uncle and I were golfing, my cousins surprised both of us by collaborating with the valet attendants and decorating the old man's Lexus SUV. He pretended to hate it, but everyone had a great laugh.