(CBS News) Since the dawn of time man has dreamed of two things. Being able to fly and having a slinky walk a treadmill for a really, really long time. And while the former came to fruition ages ...

A spiraling legacy has fascinated and frustrated Lestine Lewis for decades. Today, 40 years after that first encounter, her quandary remains: Just how do you get a Slinky to step down the stairs ...