Slinky is a classic toy that has been entertaining kids for generations. This classic toy is made of metal coils that can stretch and move in a variety of ways. Kids can use their imaginations to create fun games and activities with Slinky. It's
From Wikipedia
The Slinky is a helical spring toy invented and developed by American naval engineer Richard T. James in 1943 and successfully demonstrated at Gimbels department store in Philadelphia on November 27, 1945.