EntityQ138865· pop 24· linked from 54 articlesSoma cubeSign in to savemechanical puzzleConnectionsmotivationEntityPiet HeinEntitypolycubeEntityquantum mechanicsEntityInternational Standard Book NumberEntityWerner HeisenbergEntityRubik's CubeEntityTetrisEntitysocial psychologyEntitythree-dimensional spaceEntityMartin GardnerEntitytangramEntityScientific AmericanEntityJohn Horton ConwayEntityEight queens puzzleEntityrosewoodEntitypentominoEntitybacktrackingEntitylightnessEntitymechanical puzzleEntityCategoriesCommons link is on WikidataMechanical puzzle cubesTiling puzzles