Online since 2002. Over 3300 puzzles, 2600 worldwide members, and 270,000 messages.
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Intersecting Rings
Arancia MeccanicaA moving bead puzzle with seven colors of beads, and a base that resembles an orange.
Double DiskA puzzle with four rotating intersecting circles.
Hog Wild Double Think Binary RingTwist, slide and rotate puzzle pieces.
RotosEast german puzzle of overlapping disks.
Rubik's ShellsThe first release. This version had no reset hole. Once pushed, the buttons stay pushed. It is possible to reset the buttons, using screws.
Two-colored hungarian RingsA derivate of the hungarian rings with less marbles in only two colors.
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