Consider that the 2×2 is a pretty doable puzzle? But what if you join 2 of them together? Or 3? Or even 4? Double, Triple…
Fidgitz by ThinkFun
We had a few copies of the original Shapeways made puzzle released at IPP in August 2016. Our blog page: https://www.mrpuzzle.com.au/blog/?p=529
But now ThinkFun have released a commercially made version of this ingenious new type of twisty puzzle invented by Bram Cohen and developed in conjunction with Oskar van Deventer.
ThinkFun branded it Fidgitz. And you really won’t be able to stop fidgeting with this one once you pick it up.