• To date, Brainstring Original is played in over 40 countries
• People are still amazed by its seeming simplicity and surprised by its infinite possibilities
• Brainstring Revenge is just as knotty as the original, but features a movable ball with a 360° spin that will have you on the ropes
• Twist, turn, stretch and slide the puzzle in all directions to unravel the tightly wound knot
• Once the strings are completely separated, the puzzle is solved – no strings attached