Museo dei Ragazzi
Florence's Children's Museum may be the city's best-kept public-access secret. A series of interactive tours includes "Encounters with History," during which participants meet and talk with Giorgio Vasari or Galileo Galilei and explore secret passageways. Events occur at different venues (Palazzo Vecchio, Museo Stibbert, and the Museo Galileo). Tours are in English and must be booked in advance. Though most are geared for the three- to eight-year-old crowd, adults will find them lots of fun, too.