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![]() Date: 2008-08-27 13:07:30National Museum of American History Arthur Ganson Duncan Toys Company Pedro Flores Ashok Gadgil Creativity Donald Duncan Invention Childhood Yo-yos Lemelson Foundation Jerome H. Lemelson | Source URL: invention.smithsonian.orgDownload Document from Source WebsiteFile Size: 264,05 KBShare Document on Facebook |