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	The Pyraminx is a tetrahedron-shaped puzzle similar to the Rubik's Cube. It was invented and patented by Uwe Meffert, and introduced by Tomy Toys of Japan (then the 3rd largest toy company in the world) in 1981. The Pyraminx is a puzzle in the shape of a tetrahedron, divided into 4 axial pieces, 6 edge pieces, and 4 trivial tips. It can be twisted along its cuts to permute its pieces. The axial pieces are octahedral in shape, although this is not immediately obvious, and can only rotate around the axis they are attached to. The 6 edge pieces can be freely permuted. The trivial tips are so called because they can be twisted independently of all other pieces, making them trivial to place in solved position.
	The Rubik's Cube is a 3-D mechanical puzzle invented in 1974 by Hungarian sculptor and professor of architecture Ernő Rubik. Originally called the "Magic Cube", the puzzle was licensed by Rubik to be sold by Ideal Toys in 1980 and won the German Game of the Year special award for Best Puzzle that year. It is said to be the world's best-selling toy, with over 300,000,000 Rubik's Cubes being sold worldwide by 2005. In a classic Rubik's Cube, each of the six faces is covered by 9 stickers, among six solid colours (traditionally white, red, blue, orange, green, and yellow). A pivot mechanism enables each face to turn independently, thus mixing up the colours. For the puzzle to be solved, each face must be a solid colour.
	The Megaminx, or Magic Dodecahedron, was invented by several people simultaneously and produced by several different manufacturers with slightly different designs. Uwe Mèffert eventually bought the rights to some of the patents and continues to sell it in his puzzle shop under the Megaminx moniker. It is also known by the name Hungarian Supernova, invented by Dr. Cristoph Bandelow. His version came out first, shortly followed by Meffert's Megaminx
	The Skewb is a combination puzzle—that is, a mechanical puzzle in the style of Rubik's Cube—invented by Tony Durham and marketed by Uwe Mèffert. Although it is cubical in shape, it differs from Rubik's construction in that its axes of rotation pass through the corners of the cube rather than the centres of the faces. There are four such axes, one for each space diagonal of the cube. As a result, it is a deep-cut puzzle in which each twist affects all six faces. Mèffert's original name for this puzzle was the Pyraminx Cube, to emphasise that it was part of a series including his first tetrahedral puzzle Pyraminx. The catchier name Skewb was coined by Douglas Hofstadter in his Metamagical Themas column, and Mèffert liked it enough not only to market the Pyraminx Cube under this name but also to name some of his other puzzles after it, such as the Skewb Diamond.
	The Impossiball is a rounded icosahedral puzzle similar to the Rubik's Cube. It has a total of 20 movable pieces to rearrange, same as the Rubik's Cube, but all of the Impossiball's pieces are corners, like the Pocket Cube. .William O. Gustafson applied for a patent for the Impossiball design in 1981 and it was issued in 1984. Uwe Mèffert eventually bought the rights to some of the patents and continues to sell it in his puzzle shop under the Impossiball moniker.
	The Square One, also known as Back to Square One and Cube 21, is a puzzle similar to the Rubik's Cube. Its distinguishing feature among the numerous Rubik's Cube variants is that it can change shape as it is twisted, due to the way it is cut, thus adding an extra level of challenge and difficulty.The Square One, with the full name "Back to Square One", and alternative name "Cube 21", was invented by Karel Hršel and Vojtěch Kopský around 1990. Application for Czechoslovak patent was filed on 8 November 1990, the patent was approved on 26 October 1992 with patent number CS 277266 B6.
	The Pyramorphix is a tetrahedron-shaped puzzle similar to the Rubik's Cube. It has a total of 8 movable pieces to rearrange, compared to the 20 of the Rubik's cube. Though it looks like a simpler version of the Pyraminx, the mechanism is identical to that of the Pocket Cube.
	Alexander's Star is a puzzle similar to the Rubik's Cube, in the shape of a great dodecahedron.Alexander's Star was invented by Adam Alexander, an American mathematician, in 1982. It was patented on 26 March 1985, with US patent number 4,506,891, and sold by the Ideal Toy Corporation. The puzzle has 30 moving pieces, which rotate in star-shaped groups of five around its outermost vertices. The purpose of the puzzle is to rearrange the moving pieces so that each star is surrounded by five faces of the same color, and opposite stars are surrounded by the same color. This is equivalent to solving just the edges of a six-color Megaminx.
	The Pyraminx Crystal is a dodecahedral puzzle similar to the Rubik's cube and the Megaminx. It is manufactured and sold by Uwe Mèffert in his puzzle shop since 2008. It is not to be confused with the Pyraminx, which is also invented and sold by Mèffert. The Pyraminx Crystal was patented in Europe on July 16, 1987. The patent number is DE8707783U. In late 2007, due to requests by puzzle fans worldwide, Uwe Mèffert began manufacturing the puzzle. The puzzles were first shipped in February 2008. There are two 12-color versions, one with the black body commonly used for the Rubik's Cube and its variations, and one with a white body.
	The Pocket Cube (also known as the Mini Cube) is the 2×2×2 equivalent of a Rubik's Cube. The cube consists of 8 corner pieces, and no other types of cubies.
	The Dogic is an icosahedron-shaped puzzle like the Rubik's cube. It is a deep-cut puzzle: the 5 triangles meeting at its tips may be rotated, or 5 entire faces (including the triangles) around the tip may be rotated. It has a total of 80 movable pieces to rearrange, compared to the 20 pieces in the Rubik's cube. The Dogic was patented by Zoltan and Robert Vecsei in Hungary on 20 October 1993. The patent was granted 28 July 1998 (HU214709). It was originally sold by VECSO in two variants under the names "Dogic" and "Dogic 2", but was only produced in quantities far short of the demand; for a long time, the only feasible way to acquire it was via second-hand channels such as eBay. In 2004, Uwe Mèffert acquired the plastic molds from its original manufacturer at the request of puzzle fans and collectors world-wide, and made another production run of the Dogics. These Dogics were first shipped in January 2005, and are now being sold by Meffert in his puzzle shop, Meffert's.
	The Rubik's Revenge (also known as the Master Cube) is the 4×4×4 version of Rubik's Cube. Invented by Péter Sebestény, the Rubik's Revenge was nearly called the Sebestény Cube until a somewhat last-minute decision changed the puzzle's name to attract fans of the original Rubik's Cube.Unlike the original puzzle (and the 5×5×5 cube), it has no fixed facets: the centre facets (four per face) are free to move to different positions. The internal mechanics are rather different: the centre cubelets slide in grooves on an internal ball, which cannot be seen unless the puzzle is disassembled. The edge and corner cubelets glide on tracks formed by the edges of the centre cubelets in much the same way as in the 3×3×3 version. Methods for solving the 3×3×3 cube work for the edges and corners of the 4×4×4 cube, as long as one has correctly identified the relative positions of the colours — since the centre facets can no longer be used for identification.
	The Professor's Cube is a mechanical puzzle, a 5×5×5 version of the Rubik's Cube. It has qualities in common with both the original 3×3×3 Rubik's Cube and the 4×4×4 Rubik's Revenge, and knowing the solution to either can help when working on the 5×5×5 cube. The original Professor's Cube design by Udo Krell works by using an expanded 3×3×3 cube as a mantle with the center edge pieces and corners sticking out from the spherical center of identical mechanism to the 3×3×3 cube. The non central center pieces are fitted into spaces on the surface of the 3×3×3 mantle, and the non central edges slotted between them. All non-central pieces have extensions that fit into allotted spaces on the outer pieces of the 3×3×3, which keeps them from falling out of the cube while making a turn. The Eastsheen version of the puzzle uses a different mechanism. The fixed centers hold the center cubelets next to the central edges in place, which in turn hold the edge cubelets. The non-central edges hold the corners in place, the opposite of the original mechanism. The V-Cube 5 mechanism, designed by Panagiotis Verdes, has elements in common with both.
	The V-Cube 6 is the 6×6×6 version of Rubik's Cube. Unlike the original puzzle (but like the 4×4×4 cube), it has no fixed facets: the center facets (16 per face) are free to move to different positions. It was invented by Panagiotis Verdes and is produced by his company, Verdes Innovations SA. Methods for solving the 3×3×3 cube work for the edges and corners of the 6×6×6 cube, as long as one has correctly identified the relative positions of the colors — since the center facets can no longer be used for identification.
	The V-Cube 7 is the 7×7×7 version of Rubik's Cube. It was invented by Panagiotis Verdes and is produced by his company, Verdes Innovations SA. Like the 3×3×3 and 5×5×5, the V-Cube 7 has fixed center facets.
	Rubik´s domino , is like a 2x3x3 Rubik's cube. The sides which are 2×3 can obviously only do half turns. The top and bottom layer have different colours, and the pieces are simply numbered 1-9 with dots.In the solved position, the top layer is simply numbered from left to right, from top to bottom using the numbers 1 to 9. The bottom layer piece below each numbered piece in the top layer should have the same numbers. This means that if you look at the bottom face, the pieces are ordered in mirror image, i.e. numbered from right to left, top to bottom. You can see that this must be the intended solved position because the number 7 pieces are reflections of each other.The Magic Domino was patented by Ernö Rubik on 29 March 1983