Aussie virtual solar car racing
http://wsc.pv.unsw.edu.au/info/
In the Fantasy World Solar Challenge (FWSC) game, it's up to you to engineer the best car and then race it from Darwin to Adelaide. You'll have to decide between solar cell types, battery types etc. to come up with the best overall design.
And, to make matters more interesting, you've got to stay within your prescribed budget. Then, once your car is completed, you can attempt the race, but you'll have to keep an eye on your speed, as well as the weather conditions and the status of your car. Otherwise, you might get caught in cloudy weather with no backup battery energy to keep you going.
The game will monitor the time it takes you to complete the race, and keep your time in it's database so that you can compare your performance against all of the other entrants in the FWSC game this year.