Quick viewCompareUnited States 3186m1999 33c Celebrate the Century - 1940s: Slinky Craze Begins 1945US #3186m1999 Slinky Craze Begins 1945 – Celebrate the Century (1940s) • Part of the fifth sheet in the Celebrate the Century stamp series issued from 1998-2000• Honors the invention of the slinky chi...$2.25 - $3.20View All