I spent some time this weekend at the OLPC Physics Game Jam. I teamed up with the legendary Nirav Patel and we made a bridge building game. The objective is to build a bridge and see if it survives after a train starts travelling across it.
We only have one level so far, but it is quite engaging and not as easy as it might sound. It was interesting to see some youngsters try it and experiment with different bridge structures during the review session. The game also features some top notch sound effects coordinated by Brian Jordan.
We won the gold prize for game development. To learn more and download it, see the Bridge page on the wiki.