In 1943, the idea for the Slinky toy originated when engineer Richard James dropped a tension spring on the ground and saw how it moved. The first Slinky toys were sold in 1945 at Gimbel's Department Store in Philadelphia, Pennsylvania. And since then, stairs have never been left alone.
Also on these boards
1960's Slinky - "Who walks downstairs without a care and makes the happiest sound, jumps up and down just like a clown, everyone knows it's Slinky."
Kaleidoscope - loved this