Not exactly a Junkbot but definitely related is the Robot Obstacle Course game developed by Oregon Museum of Science and Industry . The game takes the player through exercises in Boolean Logic to allow the robot to collect keys and jump over traps to open the door. This a good and fun introduction to logic. To play the game go to: http://www.omsi.edu/tech/RobotActivity/index.htm If you would like to know more about the Junkbots project contact scott.turner@northampton.ac.uk
This is an initiative to mix sustainability, engineering and computing to students.