Sitting next to the pencil you can see how small this RC helicopter is. Called the Picoflyer, the 60 mm rotor diameter, 3.3 grams Picoflyer is the smallest size battery powered contra-rotating coaxial-rotor RC helicopter ever built. The Picoflyer can fly for 1 minute at a stretch, and uses a 900Mhz radio link for control and 1 x 3.7 V, 30 mAh Didel cell, 0.86 grams for power.

 

Unfortunately for us, the Picoflyer is not available for sale. But you can definitely read more about it on the Proxflyer site.