It's here. It's back. And it's just as dashed difficult as you remember. Curse of the early 1980s and most sought-after distraction at school breaktime (even moreso than the automatic drinks machine) Erno Rubik's masterful invention had the whole world scratching its collective head for years. Now you can scratch yours all over again. The cube - originally known as The Magic Cube - was nothing short of a global phenomenon. 300,000,000 have been sold worldwide, of which a staggering 100,000,000 changed hands in the period from 1980-82. And, with a impossibly large 43,252,003,274,489,856,000 (that's 43.2 quintillion) possible permutations, it's no surprise that many of those original 300 million are now to be found slowly decomposing in landfill sites all over the world. This is the greatest shame of all. And the reason that gadgetshop can now procure you a mint version of the original to discombobulate your brain for old time's sake.

A quick refresher for anyone born after 1980 - the Rubik's Cube measures 5.7 cm on each side and has twenty-six unique miniature cubes on its surface. There are twenty-one pieces: a single core of three intersecting axes holding six centre squares in place, and twenty smaller plastic pieces which fit into it to form the assembled puzzle. The cube is provided pristine and complete. You may wish to keep it that way. Now go. Twist.

Remember that the solution is a maximum of 26 moves away. And be driven completely mad.