Marvin's Marvelous Mechanical Museum, located in Farmington Hills, Michigan, is devoted to a huge collection of coin-operated animatronic dummies, mechanical games and other oddities. Exhibits include, for example, the classic gypsyFortune teller machine that used to grace many a carnival sideshow. Most of the machines still function, so visitors are encouraged to bring change. The museum's founder, Marvin Yagoda, has been collecting the items that populate the 5,500-square-foot (510 m2) museum for 50 years. Yagoda is a recognized expert in the field of mechanical and electrical game apparatus; he has been involved in appraisal of such items for American Pickers.