For geometric reasons, it is not possible to build a Rubik's cube of 
more than 6x6 squares, because you always need the corners to touch the 
underneath face when turning a face. Even more, 6x6 is the limit but it 
is very hard to build, and the biggest I saw (and solved :-) was 5x5.

But nothing prevents you from inventing some magnetic attaches for the 
cubes so that they can rely on nothing physical.  ;-)

JC

Greg Edwards wrote:
> On Thu, 12 Jun 2003 23:20:31 +0200, Fabien Mosen wrote:
> 
> 
>>Hello,
>>here's a funny thing I made today, a super-Rubik's-Cube in the
>>form of a Menger sponge.
>>
>>Fabien.
> 
> 
> Something frightening is that I think it would be possible to create such a 
> cube! @_@
> 
> Imagining the billions of moves required to solve one slice... OK, I think 
> I've regained consciousness...
>

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