We haven't had time to fully document our adventures and misadventures in building this robot, but here are some ideas and pictures of what's to come:
I managed to cover the robot in shaving cream (couldn't get the pushing mechanism to stop pushing!) and had to disembowel much of it to get it cleaned. Moral of the story: when testing the shaving cream, take all the expensive electronics off the robot first. (no damage was actually done... just a fright. :)).