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It's so Knotty! Building on the success of the original, this advanced version adds more sides, colored strings and easy-to-grasp rubber tips. More challenging than the original, Brainstring Advanced will stretch your puzzle solving skills to the next level.
It's genius from every angle! The classic slide puzzle has
become infinitely complex. Angle each mirror to reflect the side of an adjacent cube and create one complete image: Einstein's ...
Race to Unravel the World's Greatest Brain Teasers! A steady
stream of people enter Butch's place of business and remove its treasured belongings without paying. Butch lets them continue as ...