Sat, Oct 24 · 10:00 AM–2:00 PM
Free Family Halloween at Randall Museum Randall Museum · Castro
Come in costume for games, crafts, treats, costume awards, live music, and theater entertainment.
Who it’s for: A family celebration; the organizer does not specify a numeric minimum age.
Cost: Admission is free. Some activities have a fee; individual activity prices are not published.
Before you go: No advance registration is listed on the dated event page. Check the organizer for activity details before leaving. Checked Thu, Oct 15 · Randall Museum
Sat, Oct 24 · 10:30 AM–12:30 PM
Free Saturday Morning Playtimes Glen Park Meeting Room · Glen Park
Share toddler and preschool toys and games with other young children.
Who it’s for: Ages 0–5.
Cost: Free library program.
Before you go: Drop in; no advance registration is listed. Check the library’s dated page for changes. Checked Thu, Oct 15 · San Francisco Public Library
Sat, Oct 24 · 11:00 AM–12:30 PM
Free Magna-Tiles Free Play Chinatown Meeting Room · Chinatown
Build with colorful magnetic shapes during open-ended play.
Who it’s for: Ages 4–8.
Cost: Free library program.
Before you go: Drop in; no advance registration is listed. Check the library’s dated page for changes. Checked Thu, Oct 15 · San Francisco Public Library
Sat, Oct 24 · 11:00 AM–3:30 PM
Free Leap Sandcastle Classic Ocean Beach at Balboa Street · Richmond
Watch teams and local elementary students create large sand sculptures on Ocean Beach.
Who it’s for: A community outing to watch student and professional teams; public building participation is not confirmed.
Cost: Free for the public to attend, as confirmed on the organizer’s 2026 event-information page. Competition-team entry is separate.
Before you go: The 2026 date, hours, and location are announced. Check the organizer for visitor arrangements; competition-team entry is separate. Checked Thu, Oct 15 · Leap Arts in Education
Sat, Oct 24 · 11:00 AM–11:45 AM
Free René y Familia at Presidio Library Presidio Library back patio (Sacramento Street) · Pacific Heights
Hear children’s songs in Spanish and English on the library’s back patio.
Who it’s for: A family music performance; no numeric minimum age is specified.
Cost: Free library program.
Before you go: Drop in; no advance registration is listed. Check the library’s dated page for changes. Checked Thu, Oct 15 · San Francisco Public Library
Sat, Oct 24 · 1:00 PM–3:00 PM
Free Chess Club at Excelsior Library Excelsior Children's Area · Excelsior
Learn chess or practice with the Bright Knights Chess Club.
Who it’s for: Ages 5–18.
Cost: Free library program.
Before you go: Drop in; no advance registration is listed. Check the library’s dated page for changes. Checked Thu, Oct 15 · San Francisco Public Library
Sat, Oct 24 · 2:00 PM–3:00 PM
Free Trinket Trade at Ortega Library Ortega Meeting Room · Sunset
Bring small treasures, such as mini figures or stickers, for a one-for-one swap with the library’s collection.
Who it’s for: Children ages 8 and older.
Cost: Free library program.
Before you go: Bring clean, gently used small items to trade one-for-one. No advance registration is listed. Checked Thu, Oct 15 · San Francisco Public Library
Sat, Oct 24 · 3:00 PM–3:45 PM
Free René y Familia at Main Library Main Library Children’s Center, Floor 2 · Civic Center
Enjoy bilingual children’s songs and Latin music from a band spanning three generations.
Who it’s for: A family music performance; no numeric minimum age is specified.
Cost: Free library program.
Before you go: Drop in; no advance registration is listed. Check the library’s dated page for changes. Checked Thu, Oct 15 · San Francisco Public Library
Sat, Oct 24 · 3:00 PM–4:00 PM
Free LEGO Robotics at West Portal Library West Portal Children's Area · West Portal
Explore engineering with LEGO Mindstorms and teen volunteers from Lowell High School’s CardinalBotics team.
Who it’s for: Children ages 6 and older.
Cost: Free library program.
Before you go: Drop in; no advance registration is listed. Check the library’s dated page for changes. Checked Thu, Oct 15 · San Francisco Public Library
Sat, Oct 24 · 6:30 PM–9:00 PM
Paid SuperNatural Family Halloween at the Academy California Academy of Sciences · Golden Gate Park
An evening of trick-or-treating, animal demonstrations, and a silent disco inside the museum.
Who it’s for: A family event: every adult ticket holder must attend with a child. Ages 2 and under are free.
Cost: General admission: adult $60 and youth $45; members $55/$40. Ages 2 and under free. The announcement and ticket selector disagree on the age-18 boundary; confirm that ticket category before purchasing. Food and some drinks cost extra.
Before you go: General-admission ticket options were listed on October 15; no purchase was attempted. Confirm current availability. Entry starts at 6:30 PM; 5 PM early entry needs a separate ticket. Werewolf Den VIP is sold out. Read the child-friendly costume rules. Checked Thu, Oct 15 · California Academy of Sciences
