This week of LEGO at 4H Camp is for 9 through 12 year olds.
RoboLab programming of the RCX had the motors going when the light sensor reading went up -
so the gate could go up when you flash a light.
We had a visitor on the wall.
http://lego.marshall.edu to teleoperate the LEGO City at Marshall University
http://Mars.Marshall.edu for Mars Station South Pole