Move the coloured buttons within the transparent cube without entangling the strings

The transparent cube contains an elaborate arrangement of criss-crossing elastic lines with different coloured buttons on each end. The challenge is to move the buttons around, so that there is a combination of two, three or four colours the same on each side, without entangling the strings. It is far more difficult than can be assumed, but if that is too taxing the website accompanying the product encourages complex and beautiful knots to be intentionally made within the cube; if a new one is found, then the creator has the honour of naming it.

Features

• Transparent tube (10 x 10 x 10)cm
• Move the buttons to match the coloured strings
• Accompanying website with complex designs