Is there anything LEGOs can’t do? The idea of building a working Rubik Cube has always appealed. Here the challenge is to create a mechanical device that has a number of degrees of freedom about a central point. It’s not easy! The cube consists of 12 edge pieces, 8 corner pieces and one central piece. All of these have to be interlocking, yet still be able to rotate about any axis at any time in any direction. Link.