If you don't find yourself particularly enthralled with the small assortment of pre-assembled quadcopters already on the market, Jasper van Loenen's DIY—or Drone It Yourself—kit lets you turn almost anything into an unmanned aerial vehicle. Or at least anything light enough for its four rotors to lift.
Created with the assistance of a 3D printer, the kit can be assembled with basic skills and tools, and piloted either with an app running on a Bluetooth-connected mobile device, or a laptop. Jasper even encourages people to hack and enhance his design to suit their particular drone requirements, so can anyone recommend a reliable water balloon release mechanism? [Jasper van Loenen via Creative Applications Network]