sodium launcher with xbee's

Fun little project. Sodium blowup demonstration covers a lot of ground in chemistry: molarity, acid/base, logarithms,ph, periodic trends, stoichiometry. We work out the predicted ph of the bucket of water after the sodium reacts and makes sodium hydroxide. Thought it would be fun to put together a simple radio controlled sodium launcher with a pair of xbee's signalling a servo motor to drop the sodium - for safety, of course.

           Launcher.  Servo run by arduino receives command via xbee.