Speedcubing are also different shapes of the famous puzzles, including Pyraminx, Megaminx, Skewb, and Square-1. The Rubik's Cube was invented in 1974 by Hungarian professor of architecture, Ernő Rubik. A widespread international interest in the cube began in 1980, which soon developed into a global craze. On June 5, 1982, the first world championship was held in Budapest, Hungary. 19 people competed in the event and the American Minh Thai won with a single solve time of 22.95 seconds. Other notable attendees include Jessica Fridrich and Lars Petrus, two people who would later be influential in the development of solving methods
Singer puzzle box plus spare needles, bobbins, screws, and screwdrivers. The accessories fit into a fold-out rectangular wooden box elegantly lined with velvet. Each accessory has its own particular niche in the box, such that they will all fit together into the small space of the folded-up box. The box was invented in 1888 by John M. Griest, a Singer employee who won a US patent for the design. Singer puzzle box A Singer puzzle box is a collection of accessories for a sewing machine. Produced by the Singer Manufacturing Company during the 19th and 20th centuries, these neat and compact kits provide