Meet ELFi robots: DIY robots built using LEGO, Arduino, Raspberry Pi, and other parts. The platform is developed to help you learn more about robots and programming them. ELFi Big is a LEGO EV3 robot capable of dancing, fighting, and indoor navigation. It also has a projector and external speaker, so you can use it as a telepresence robot.
The above video provides more information on ELFi robots. More information is available on Kickstarter.