Brainstring Value Pack Puzzle (Includes the Brainstring Original, Brainstring Advanced, and Brainstring R) * EXACT COLORS OF THE SET YOU RECEIVE MAY VARY SLIGHTLY Brainstring Original Retro: Recommended Ages : 6+ Years Comprises of a transparent polycarbonate cube with 12 elastic strings Using an ingenious pattern of incisions the strings can be moved through the cube The result: complex knots appear on the inside. The main goal of the game is to switch the outside button colors, without creating a knot inside. Brainstring 'R': Recommended Ages : 7+ Years The popular Brainstring turned inside out! The "R" stands for "Revenge" and is just as knotty as the original This version 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 Brainstring Advanced: Recommended Ages : 7+ Years Advanced playing level Brightly colored elastic strings 100% symmetrical design More challenging puzzle Button covers are color matched to the strings New, improved high-quality packaging Transparent polycarbonate cube 3.14" x 3.14" * EXACT COLORS OF THE SET YOU RECEIVE MAY VARY SLIGHTLY Includes the Brainstring Original Includes the Brainstring Advanced Includes the Brainstring R