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BB-8 : Motorized and Remote Controlled
It's powered by an Arduino board and remote controlled via RF. This droid self-balance on two wheels, play sounds, and has several programmable LEDs.
Printing the whole body and head takes about 200 meters (656 feet) of filament, and 50 hours on a regular PLA 3D printer. No support required.
Instructions coming soon!
Some instructions are here http://www.instructables.com/id/BB-8-Droid-3D-Printed-Remote-Controlled/