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Six-Sided: Cube (Shape Changing)
Professor Axis CubeAn "axised" Eastsheen 5x5x5.
Professor Ghost CubeThe higher order brother of the Ghost Cube. Made from a 5x5x5.
Professor Square-1A five-layered version of the Square-1 puzzle. With additional slices: 20 instead of 12.

Professor Windmill CubeA 5x5x5 twisted inside of its solid. Katzuhiko Okamoto's concept applied to a 5x5x5.
Proxy Cube (Mercury)In essence, a shape mod of a Crazy X-Cube. The first of the Proxy Fisher series.
Pseudo Mirror CubeA very clever "sticker variation" of a transparent 3x3x3.

PuckubeA puck heavily extended into a hexahedrons shape.
PycubroA Pyraminx with heavy extensions and a batch of additional volume to give it a true cubic shape.
PyracueA Skewb variation built by Hiroshi Ishino and presented by Katsuhiko Okamoto.

Quirky CubeA puzzle which reminds one of the Square-1 but introduces a whole set of changes to the original set.
Radio Cube 3A Radiolarian 3 (a face-turning icosahedron) redesigned to have the shape of a cube.
Rafael's Cube aka Fisher Bump CubeA bump cube was fishered or a Fisher Cube was bumped.

Rainbow MirrorborgA Bump Cube (aka Mirror Blocks) transformed like a Borg Cube. Small colored bits are added.
RB Square-2The concept of the "Marcos Square-1" applied to a Square-2: A Square-2 in midturn transformed back into cubic shape.
Rex Ghost CubeThe concept of the Ghost cube applied to the Rex cube. This time with differently coloured stickers.

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Genius Hockey Puck

On Sale:
Rubik's 360
$18  $14.4

On Sale:
Eastsheen 5x5x5 (Dome)
$21  $14.7