Online since 2002. Over 3300 puzzles, 2600 worldwide members, and 270,000 messages.

Moving: Tiles
Rotascope - CustomizedThree customized Rotascopes with themes based on the other hobbies of the customer.
Rotascope - EscherFour customized Rotascope with themes based on famous works of M.C. Escher.

Rotascope - Escher IICustomized Rotascope with a theme based on famous works of M.C. Escher. This time with a non-circular body.
Rotascope - ManFeatures an image of a man with awkwardly raised hair.
Rotascope - MarilynFeatures an image of Marilyn Monroe.

Rotascope - Red LogoFeatures an image of a snake entwined with a red version of the Pentangle logo.
Rotascope Black SymbolBandaged rotating circles
Rotating pillsOne rotating circle and one plunger rotate and move several pieces that look like pills.

Roto 36Four circles. One with 120°-steps, three with 60°-steps.
Roto 44Four circles in square configuration with a fifth in the center.
RotosEast german puzzle of overlapping disks.

Rubik's Fifteen (aka: XV)Rubik's 15 (XV) is 2 puzzles in one. Arrange the numbers in sequence 1 to 15. On the other side there is a magic square challenge.
Sando RingSimilar to a King Ring. With touchable symbols.
Slice RuleThree plungers and one circle intersect and make 15 pieces move around.


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