Check out these Pinewood derby cars I made for Engineer's Week at work. The number 4 car is this years; number 33 is from the previous. Unfortunately, I did not win, but I will say that my cars look the most like cars instead of the typical wedges. I think they look pretty cool for only having a few weeks to work on them (minus the paint -- I've still got a lot to learn making that better). I was thinking next year it would be really sweet to model a car using a 3D printer. Perhaps I could bring one home in one of those Instructables contests...wink wink.