This wild, 3D-printed self-solving Rubik’s cube is superb. To build it work, a Japanese inventor used servo motors and Arduino boards to actuate the cube because it solves itself. Sadly, there isn’t much of a build description out there however it appearance to be very compact and surprisingly fast.
There is an outline of the project on DMM-Create and you can watch the small cube scoot around a table because it solves itself in but a second. The creator also designed the Human Controller, a cute system for controlling a personality's as they walk down the road, and the Human Crane Game which is equally inexplicable. If this Ru-bot is real and prepared for prime time it may be an amazing Kickstarter.