The mystery of Brainstring Original isn�t just how to untie a twisted �knot� of strings in the center, but how it can be that all its strings can be interchanged�WITHOUT creating a knot! Four groups of different colored 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.
It�s knot what you think