Slinky

source: wikidatahelical spring toy

source: wikipedia_enThe Slinky is a helical spring toy invented and developed by American naval engineer Richard T. James in 1943 and successfully demonstrated at Gimbels department store in Philadelphia on November 27, 1945. 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; and appearing to levitate for a period of time after it has been dropped. These interesting characteristics have contributed to its success in its home country of the United States, and it has inspired many popular toys with Slinky-like components, in a wide range of countries.

source: wikidataばね状の玩具

source: wikipedia_jaスリンキー（Slinky）はジェームズ・インダストリーズ社が販売しているばね状の玩具である。 類似品も一般名称として「スリンキー」と呼ばれている。本稿は、ジェームズ・インダストリーズ社の製品及び類似品について説明する。