History of the Yo-Yo
   Learn about the past and present of the yo-yo.
   http://www.spintastics.com/HistoryOfYoYo.asp

Museum of Yo-Yo History
   Archive of historical yo-yo images, profiles, memorabilia, and information.
   http://www.theyoyomuseum.com/

National YoYo Museum and Contest
   Information, rules and competitions' results, pictures and historical data.
   http://www.nationalyoyo.org/

The History of Toys and Games Yo-Yo Exhibit
   A History Channel article on yo-yo history.
   http://www.history.com/exhibits/toys/yoyo.html

The History of the Yo-Yo
   About.com article by Mary Bellis.
   http://inventors.about.com/library/weekly/aa120297.htm