Asian Art Museum
200 Larkin (at McAllister), S.F., 581-3500, www.asianart.org
Free on the first Tuesday of each month (children 12 and under always free), 10 a.m.-5 p.m.
Berkeley Art Museum and Pacific Film Archive
Free on the first Thursday of each month (children 12 and under always free), 11 a.m.-7 p.m.
California Academy of Sciences
875 Howard (between Fourth and Fifth streets), S.F., 750-7145, www.calacademy.org.
Free on the first Wednesday of each month (children under 4 always free), 10 a.m.-8:45 p.m.
California Palace of the Legion of Honor
Lincoln Park (Clement at 34th Avenue), S.F., 863-3330,
Free every Tuesday (children under 5 always free), 9 a.m.-5 p.m.
Free on the first Wednesday of each month (children 3 and under always free), 10 a.m.-5 p.m.
Golden Gate Park Historical Walking Tours
Friends of Recreation and Parks
Free walking tours of Golden Gate Park, including several toddler-friendly options.
Pier 45 (at Taylor), S.F., 346-2000.
Admission is always free, Monday-Friday 11 a.m.-7 p.m., Saturday-Sunday 10 a.m.-8 p.m.
Museum of Craft and Folk Art
Fort Mason Building A, Buchanan (at Marina), S.F., 775-0991, www.mocfa.org.
Free on the first Wednesday of each month, 11 a.m.-7 p.m.
1000 Oak (at 10th Street), Oakland, (510) 238-2200, www.museumca.org.
Free on the second Sunday of each month (children under 6 always free), noon-5 p.m.
San Francisco Cable Car Museum
1201 Mason (at Washington), S.F., 474-1887, www.cablecarmuseum.com.
San Francisco City Guides
S.F. Main Library
100 Larkin (at Ninth Street), S.F., 557-4266, www.sfcityguides.org.
Free walking tours every day of the week, focusing on subjects ranging from neighborhoods and popular landmarks to themes like "Art Deco" and "Bawdy & Naughty."
San Francisco Fire Department Museum
655 Presidio (at Pine), S.F., 558-3546, www.sffiremuseum.org.
Free admission always, open Thursday-Sunday 1-4 p.m.
San Francisco Maritime Museum
Polk (at Beach), S.F., 561-6662, www.maritime.org.
Admission to the museum building is always free.
San Francisco Museum of Modern Art
151 Third St. (at Mission), S.F., 357-4000, www.sfmoma.org.
Free on the first Tuesday of each month (children 12 and under always free), 10 a.m.-6 p.m.
San Francisco Zoo
Sloat (at 45th Avenue), S.F., 753-7080, www.sfzoo.org.
Free on the first Wednesday of each month (children under 3 always free), 10 a.m.-5 p.m.
Strybing Arboretum and Botanical Gardens
Golden Gate Park, Ninth Avenue (at Lincoln), S.F., 661-1316.
Admission is free, as are guided tours, Monday-Friday 8 a.m.-4:30 p.m., Saturday-Sunday 10 a.m.-5 p.m.
701 Mission (at Third Street), S.F., 978-2787, www.yerbabuenaarts.org.
Free on the first Tuesday of each month, 11 a.m.-5 p.m.