Brainstring Original

The mystery of Brainstring Original isn?t just how to untie a twisted ?knot? of strings in the centre, but how it can be that all its strings can be interchanged? WITHOUT creating a knot! Four groups of different coloured strings, four strings per group, moving up, down and around all six sides of a polycarbonate shell? beyond just tying or untying a knot, what kind of beautiful symmetries can you create? Brainstring Original isn?t just a puzzle ? it?s a work of art.