Brainstring Retro Puzzle
Brain string Retro.-Puzzle will tie your brain in knots. Real challenge is untangling the knot in the middle. Make the puzzle easier or harder based on how much you tangle it up. Stretch your imagination to find the solution. Color/Finish: -Pull the rubber tips to slide the colored strings through the open slots of the sphere. Creating a solid color on each side is no small task. Great for travel, stimulates creative thinking skills and will provide hours of fun.