PS: to your ending question about change and the Slinky ...

In the language of toy metaphors, I experience change as more like either Rock 'Em, Sock 'Em Robots or Operation:)

Rock 'Em ...  involves banging away at something until you overcome it.

Operation involves the application of very precise movements to achieve the goal.

Of course, while engaged in change, I usually feel most like either a Yo-Yo or Battleship:)

John