As part of his research into building a functional Lego version of Star Wars: The Force Awakens’ BB-8, Jason Allemann of JK Brickworks created this brilliant remote control monowheel that’s able to steer itself by shifting a counterweight inside from side to side causing the vehicle to lean into corners.
It’s not quite perfect yet, though. Since the counterweight is hidden inside the monowheel while it’s rolling, returning it to the exact centre after steering is all but impossible, leading to quite a bit of instability. But the fact that this creation works at all is impressive, and if Allemann is able to perfect the engineering inside of it, he will provide instructions on his site so you can build one for yourself. [JK Brickworks]