America owes its fascination with the yo-yo mainly to Chicago businessman Donald F. Duncan Sr., who spotted it while on a business trip to San Francisco in 1928. It was being used by Pedro Flores, a ...

June 6 marks National Yo-Yo Day, a celebration of one of the world's oldest and most enduring toys. The date honors the birthday of Donald F. Duncan Sr., the entrepreneur who helped turn the yo-yo ...

Donald Duncan Jr., whose father founded the company in the 1920s that churned out millions of Duncan yo-yos and who later helped popularize the toy himself, has died in a single-vehicle crash in ...

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The Duncan Family Yo-Yo Collection consists of papers, photographs, advertising materials, scrapbooks, clippings and audio-visual materials. These materials trace the rise and fall of the companies ...