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Speed Stacks Gen5 Pro Timer is the...
Several classic and modern Puzzles: brain teasers, mazes and many more.
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BRAIN STRING ADVANCED is an updated version of the original puzzle that was a real bestseller during the last decade. Move the rubber tips to untangle the knot and get the same colour on all sides. Can you do it?
Align the grooves and rotate the two halves in opposite directions. To keep your mind working for hours on end. A challenge only for the most daring.