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LEGO Persistence of Vision

The human visual system has many interesting quirks. One of the best known is that of 'Persistence of vision'. This is where you're still able to see something in a given position, even though it's no longer there. TV and films rely on this to create the illusion of continuous motion, even though it's a series of still images. This wand uses the same idea, by moving the LEDs across your field of view they appear to build a floating image in the air. You can reprogram the image to be anything you like.

Rubik Cube Solver

So, there are a number of Rubik cube solves around - some fake, some not - but this is one of my favourite. The elegance of the robots design indicates how simple the cube really is, since it only ever needs to rotate a single slice. The trick then becomes how to position the appropriate slice at the bottom, a much simpler task in robotics.

The victory roll at the end, is also a nice touch.

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