Which company was tasked with manufacturing the helical spring toy that can perform tricks?
Slinky: A Slinky is a toy precompressed helical spring invented by Richard James in the early 1940s. Slinky:  It can perform a number of tricks, including travelling down a flight of steps end-over-end as it stretches and re-forms itself with the aid of gravity and its own momentum, or appear to levitate for a period of time after it has been dropped.
i don't know