This tiny palm size quadcopter arrives in kit form, with all the parts you need. This quadcopter project is completely open-source and designed for development and hacking, the Crazyflie Nano Quadcopters are among the smallest in the world. (9cm motor to motor size). This quadcopter is perfect if you are looking for a powerful quadcopter development platform that you can use indoors. With a 32bit controller onboard, you will only be limited by your imagination. We also sell a wide range of crazyflie spare parts.