Online since 2002. The most comprehensive site for all around twisty puzzles.

Can with dotsA 2x2x2 puzzle in the shape of a can based on the K-ball mechanism
Case Cube (Box Cube)An extended version of the "Octagon/Cube".
Caution CubeA Rubik's Cube with edges that turn by gears.

Checker Cube aka Chess Cube aka Checker BoardA black-and-white 4x4x4. Still not trivial to solve.
Chi Gung Massage BallAn elusive puzzle dating back from the times of the original puzzle craze.
ChopsticksA mass produced 1x2x9 produced for Mefferts Jade Club.

Corner PocketA bandaged 3x3x3 in disguise.
Crystal Cube with Gold KeyA 3x3x3 with transparent body and a key to easily assemble the cube.

Crystal PyraminxA special edition of the Pyraminx sold for the 50th anniversary of the original puzzle.
Curvy CopterA variation on the Helicopter Cube that uses curved cuts to reveal the otherwise hidden centerpieces.

Curvy Copter PlusA Curvy Copter with split up X-pieces
Dogic (11 colors)Mefferts variant with two white tips.
Dogic III (5 Colors)One of the color variants Mefferts sold during his run of Dogics.

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