That's all pretty clear.
What it leaves me wondering at is the simple genius behind the Slinky itself.
(Which, by the way, worked way better in the original steel version..I just couldn't avoid buying one of the current plastic [!] imitations.)
Perfect add!
If I can I will find the story on that and post. For some reason I am thinking it was sort of interesting...but it has been decades since I heard it.