Family friendly hands-on event brings 1840s Mexican California to life inside & outside the two-story adobe walls of General Vallejo’s rancho headquarters. Admission includes all activities. $2–$3. Ages 5 & under: Free. 10 a.m.–4 p.m. Petaluma Adobe State Historic Park. 3325 Adobe Rd., Petaluma. parks.ca.gov/petalumaadobeshp.