Fun with Wii Outdoors
I would say I am "almost" really impressed by this, Lol. I think they should have played it while driving though! The blog I found this on says they have the Wii hooked up to a power converter and aaxa mini projector. I'm new here and not sure if DIY's are allowed but it looks simple enough: Power converter from Best Buy, aaxa has a website (http://www.aaxatech.com), and put a white sheet on your car.
That looks wild! Maybe instead of a sheet (looks a little ghetto IMO) you could put together a cheap screen with some cardboard and paint