San Francisco offers a wealth of affordable, family-friendly activities despite its reputation for high costs. Iconic spots like Pier 39 provide free entertainment with playful sea lions, while Golden Gate Park features vast green spaces and gardens with select free entry days. Union Square hosts free events and walking tours, and the Ferry Building combines delicious food with stunning bay views. Families can explore history at Fort Point, ride vintage rails, or enjoy interactive experiences at museums such as the Randall Museum. With various budget-friendly transportation options like Muni, BART, ferries, and walking, San Francisco becomes an accessible urban playground for kids and parents alike.