A few weeks ago my 6 year old son took his Nerf SuperSoaker to the beach and the salt water damaged the battery pack. Yesterday he pulled it apart to see how it worked and after a couple of quick tests with the multimeter we worked out the switch on the battery pack was the problem.
While it was dismantled we decided to “enhance” it with a Netduino+ and an ultrasonic range finder so it squirted water automatically when a target got with 2.5m. The code for the Ultrasonic range finder was adapted from Dave’s code on Netduino.com
Bill of Materials