Test your ingenuity and wireframe car building skills over at this Johnson Controls flash game I am referring to as The Coconut Car. Basically, you build a vehicle and see how fast you can get to the material shredder at the end of the route.. more than likely your design isn't going to make it on the first try but the challenge is the fun.

The car building tools are intuitive and easy to make just about any configuration but once you get it out on to the track you're bound to need some modifications. Give it a try and post your results in the comments...