Coke CubeA can of coke converted into a 3x3x3 cube.
CollideThree circles with 90°-turns but in different sizes.
Color Exchange20 pieces on two separate rings and one moveable plunger.
Color Sudoku CubeIron beads glued onto a 3x3x3 to create a Sudoku on every side of the cube.
Colorful Snake Cube 5x5x5A 5x5x5 with several stickers removed to give the impression of a snake going through all sides of the cube.
ColossusA puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope 24-cell (also known as Icositetrachoron).
ColumnCubes CE+CEThree 3x3x3 connected to each other to implement three different subgroups.
ColumnCubes E+EThree 3x3x3's "siamesed" with the help of 2 throughgoing edge-blocks.
ComGenex Cube Combinatorial chemsitry training tool and promotional item
Compass 2DEight segments, one rotating circle and one moving hole.
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