Approximate Dimensions: 4" x 4" x 4"
The popular Brainstring has been turned inside out! 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.
