The Cable Car Museum
The Exploratorium
The Craft and Folk Art Museum
Ansel Adams Center for Photography
The Jewish Museum
The Maritime Museum
The Mexican Museum
The Museum of Russian Culture
SF Fire Dept. Museum
The Tattoo Art Museum
Women's Heritage Museum
The American Carousel Museum
The Cartoon Art Museum
The Pacific Heritage Museum

These are but a few, a more comprehensive list can be found in the telephone
book (one of the 'majors' have been listed).  Not knowing your interests, it
is difficult to set you in the appropriate direction.

Have fun,

Robyn
(A Bay Area museum studies grad student - drop me a line for further info,
if you want.)