Invented in Germany in the 1920s these toy Plug-In Figures building kits hinge (literally) on the flexible "jummi" rubber connectors patented by Georg Kellner. A former airplane builder, who started a successful model plane company, Kellner created simple kits with interchangeable parts that could be combined to make posable figures.
Five of these kits Tim, Hoppy Hare, Squeek the mouse, Edward + Erna and The Merry Bachelors are available online from Thorsten Van Elton ranging from £16-32.