Toys rubik's Cube is a mechanical puzzle invented in 1974 by the Hungarian sculptor and professor of architecture Ernõ Rubik. It is a plastic cube comprising 26 smaller cubes that rotate around a typically unseen kernel. Each of the nine visible facets on a side of the Rubik's Cube exhibits one of six colours. When the puzzle is solved, each side of the Rubik's Cube is a different colour, but the rotation of each face allows the smaller cubes to be rearranged in many different ways. The challenge of the puzzle is to return the cube to its original state, in which each face of the cube consists of nine squares of a similar colour. toy is something to play with, for children, adults or both. They may either be the sole device used in an enjoyable activity or one of many. Toys have been in existence for thousands of years; dolls either of infants, animals, or soldiers, and miniature representations of the tools of adults are readily found at archaeological sites. The Inca, for example, had a rolling toy even though their adult culture did not employ the wheel. Two comparatively recent developments of toys have been their mass production and copyrighting. A number of these copyrighted, mass-produced toys are associated with particular decades in the twentieth century. the yo-yo is a toy consisting of two equally-sized discs of plastic, wood, or metal, connected with an axle, around which a string is wound. There is a slip knot at the free end of the string, and, on a properly strung yo-yo, an uncut loop around the axle end which allows it to spin freely, or "sleep" upon reaching the string's end. It is played by tying the string's free end around the middle finger, grasping the yo-yo, and then throwing it with a smooth motion. As the axle spins within the loop, a gyroscopic effect occurs, permitting time to perform a number of movements. By flicking the wrist, the yo-yo can be made to return to the player's hand, with the cord again completely wound into the groove. Any movement, or combination of movements, which result in the return of the yo-yo to the player's hand in this fashion is considered a trick. while the word Frisbee is a registered trademark of the Wham-O toy company, the term is often used generically to describe flying discs similar to those made by the company. They are generally plastic, roughly 8 to 10 inches (20-25 cm) in diameter, with a lip. They are designed to fly aerodynamically when thrown with rotation and can be caught by hand. A wide range of frisbee variants are available commercially. Disc golf discs are usually smaller but denser and are tailored for particular flight profiles such as stability or distance. When it was discovered that dogs enjoyed chasing and retrieving the slow-moving discs, special frisbees were designed with more pliable material that would better resist the dog bites. Disc dog competitions, in which dogs' frisbee-catching skills are judged, have become quite popular as well. Frisbee-like discs shaped like a Saturn's ring, known as aerobies, typically fly significantly farther than traditional frisbees. the Teddy bear is a stuffed toy bear for children. It is an enduring, traditional form of stuffed animal, often serving the purpose of comforting upset young children. In recent times, some teddy bears have become expensive collector's items. The world's first Teddy Bear Museum was set up in Petersfield, Hampshire, England, in 1984.The Teddy bear is named after former U.S. President Theodore Roosevelt, whose nickname was "Teddy" and who enjoyed big game-hunting. The name is said to come from an incident on a bear-hunting trip in Mississippi in 1902, when Roosevelt's attendants found and caught a juvenile Louisiana Black Bear. Roosevelt refused to kill the lassoed animal, calling it "unsportsmanlike", and "Teddy's Bear" was immediately publicized by political cartoonists. the kaleidoscope is a tube of mirrors containing loose coloured beads or pebbles, or other small coloured objects. The viewer looks in one end and light enters the other end, reflecting off the mirrors. Typically there are two rectangular lengthways mirrors. Setting of the mirrors at 45 degrees creates eight duplicate images of the objects, six at 60 degrees, and four at 90 degrees. As the tube is rotated, the tumbling of the coloured objects presents the viewer with varying colours and patterns. Any arbitrary pattern of objects shows up as a beautiful symmetric pattern because of the reflections in the mirrors. A two-mirror model yields a pattern or patterns isolated against a solid black background, while a three-mirror (closed triangle) model yields a pattern that fills the entire field.