Start your weekend in Central Austin by donating blood, catching a symphony performance of 'La La Land' or adopting a pet. Friday

1. Austin orchestra plays ‘La La Land’ for guests

The Austin Symphony Orchestra performs the Academy Award-winning movie soundtrack live during a screening of the film. 8 p.m. $39. Long Center for the Performing Arts, 701 W. Riverside Drive. www.thelongcenter.org Sat.-Sun.

2. Battle of the Badges begins

We are Blood's 10th annual blood drive competition Battle of the Badges starts Saturday and runs through July 8. Austinites who donate blood can vote for the City of Austin’s Fire Department, Police Department or Austin-Travis County EMS. The department with the most votes will be declared the winner and receive a trophy. Blood donors will receive a limited-edition T-shirt. Donate at at any of We Are Blood’s three donation locations (South Austin, North Lamar Boulevard and Round Rock) and at any designated mobile drives throughout Travis County from July 5 to July 7. www.weareblood.org

3. KittyPalooza returns

This Saturday and Sunday, head to the Austin Animal Shelter for the 10th annual KittyPalooza. Adoption fees for all shelter pets will be waived. 11 a.m.-7 p.m. Free. Austin Animal Shelter, 7201 Levander Loop, Bldg. A. www.austintexas.gov/department/aac

4. Filmmakers square off in web series festival

International film artists compete against each other while showcasing their web series in the fourth annual Austin WebFest, including public panels, workshops and screenings. 9 a.m.-7:30 p.m. (Sat.), 9 a.m.-7 p.m. (Sun.). Free. Trinity Hall, 311 E. Fifth St. www.austinwebfestival.com Sunday

5. Visit the Bob Bullock Museum for free

Hosted by H-E-B, families can explore the Bob Bullock Texas State History Museum at no cost every first Sunday of the month. Special family programs from noon-3 p.m. combine art creation, exploration stations and gallery activities. For Fourth of July weekend, activities include hat-creating for the museum’s parade and songwriting. Noon-5 p.m. Free. 1800 Congress Ave. www.facebook.com/events/216904835490371