Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 78. Chapters: Mechanical puzzles, Soma cube, Tower of Hanoi, Flexagon, Rubik's Cube, Jigsaw puzzle, Peg solitaire, Combination puzzle, Speedcubing, Toy train, Rubik's Revenge, Fifteen puzzle, Professor's Cube, Klotski, Square One, V-Cube 6, V-Cube 7, Pyramorphix, Megaminx, Rubik's Magic, Dogic, Cymbal-banging monkey toy, Helicopter Cube, Pyraminx, Rubik's Snake, Impossible bottle, Pocket Cube, Snake cube, Pyraminx Crystal, Happy Cube, Rush Hour, Impossiball, Skewb Ultimate, BrainTwist, Rubik's Clock, Mechanical toy, Sliding puzzle, Disentanglement puzzle, Secret decoder ring, Equilibrium, Rubik's Magic: Master Edition, Sudoku Cube, Rubik's 360, Puzzle jug, Alexander's Star, Minus Cube, Puzzle ring, Wind-up toy, Skewb Diamond, Baguenaudier, Nintendo tumbler puzzle, Burr puzzle, Egg of Columbus, Magnet Space Wheel, Eastsheen, Hoppers, Snapper Puzzle, Puzzle globe, Think-a-Dot, Rubik's Triamid, Puzzle box, Missing Link, Pyramid puzzle, Diabolical cube, Lock puzzle, Moo box, Yoshimoto Cube, Human knot, Fuddling cup, Mechanical bank, Puzzle jewelry, Gridlock, Libelle. Excerpt: The Rubik's Cube is a 3-D mechanical puzzle invented in 1974 by Hungarian sculptor and professor of architecture Ern Rubik. Originally called the "Magic Cube," the puzzle was licensed by Rubik to be sold by Ideal Toy Corp. in 1980 and won the German Game of the Year special award for Best Puzzle that year. As of January 2009, 350 million cubes have sold worldwide making it the world's top-selling puzzle game. It is widely considered to be the world's best-selling toy. In a classic Rubik's Cube, each of the six faces is covered by nine 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...