A chap called Jonathan Kinlay has innovented a Rubik’s cube variant which only has one colour, but six different integer sequences on its sides. As a colourblind integer sequence enthusiast, this basically *has* to be my ideal Christmas present, right?

Well, it’s currently looking for funding on Kickstarter in advance of actually existing, and the first units won’t be delivered before Christmas, but it’s a fun idea anyway. Here’s Dr Kinlay’s pitch for your cash.

The six faces show (the first 9 elements of) the triangular numbers, the prime numbers, the decimal digits of *π*, a magic square, the Fibonacci series, and the decimal digits of *e*.

Since the orientation of the squares matters, I think the Magic Cube is equivalent in difficulty to the Sudokube. If it tickles your fancy, \$20 will get you a plastic cube, while metal and wood versions are available for substantially more. They’re looking for \$7,500 in funding and at time of writing they’ve raised \$2,662, with a couple of weeks to go before the Kickstarter deadline.

Jonathan Kinlay is a founding partner of Innovation Factory, a company which offers help with turning a design into a manufacturable product, and then arranging crowdfunding to produce it. Since Kinlay does high-frequency trading for his day job, it looks like the Magic Cube is just a test case for their business model.

Meanwhile, a ‘magic cube’ is already a thing: it’s the generalisation to three dimensions of a magic square. A perfect magic cube of order 5 was discovered in 2003. Now *that’s* cool!

### More information

The Magic Cube – A Mathematic 3D Logic Puzzle fundraising page at Kickstarter.

Magic Cube at Wolfram MathWorld.