Slinky (or Lazy Spring) is a toy consisting of a helical spring that stretches and can bounce up and down. It can perform a number of tricks, including traveling down a flight of steps end-over-end as it stretches and re-forms itself with the aid of gravity and its own momentum. The toy was invented and developed by naval engineer Richard James in the early 1940s and demonstrated at Gimbels department store in Philadelphia, Pennsylvania in November 1945. The toy was a hit, selling its entire inventory of 400 units in ninety minutes. James and his wife Betty formed James Industries in Philadelphia to manufacture Slinky and several related toys such as the Slinky Dog and Suzie, the Slinky Worm. In 1960, James' wife Betty became president of James Industries, and, in 1964, moved the operation to Hollidaysburg, Pennsylvania. In 1998, Betty James sold the company to Poof Products, Inc.
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