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Brainstring 'R'. The popular Brainstring has been turned inside out! Brainstring Revenge is just as knotty as the original, but features a movable ball withBrainstring Original isn't just a puzzle—it's a work of art. The main goal is to move the coloured buttons from hole-to-hole to create a solid color on every Take it for a spin Just as knotty as the original, Brainstring 'R' features an internal sphere with 360-degree spin. Twist, turn, stretch and slide the Browse Recent Toy Brainstring R Puzzle owner's manuals, user guides, instructional help documents & operating information to learn more about your product.