What to do in Atlanta: Fairs, festivals and more | July 29-Aug. 5

Stay cool this weekend at the Gwinnett Center International Film Festival or the "Sound of Music" sing-a-long.

"Ghostbusters." Part of the Fox Theatre Coca-Cola Summer Film Festival. 7:30 p.m. July 30. $10. Fox Theatre, 660 Peachtree St. N.E., Atlanta. 1-855-285-8499, www.foxtheatre.orgRead more about the Fox Summer Film  Festival lineup here.

Gwinnett Center International Film Festival. July 31-Aug. 2. $15-$35. Gwinnett Convention Center, 6400 Sugarloaf Parkway, Duluth. www.gwinnettcenter.com.

Old Soldiers Day Parade. Parade goes along Roswell Street and ends at the American Legion post. 9:15 a.m. Aug. 1. Free. American Legion, 201 Wills Road, Alpharetta. 678-297-6000, www.alpharetta.ga.us.

Cool Dads Rock Soapbox Derby. 11 a.m.-4 p.m. Aug. 1. Free admission; participant registration $37.50-$60. Historic Fourth Ward Park, 680 Dallas St., Atlanta. www.cooldadsrock.com.

Learnapalooza ATL. 10 a.m.-5 p.m. Aug. 1. Chattahoochee Hills Charter School, 9670 Rivertown Road, Chattahoochee Hills. www.LearnapaloozaATL.com.

Southeast Yo Yo Championship. 11 a.m.-8 p.m. Aug. 1. Town Center at Cobb, 400 Barrett Pkwy., Kennesaw. www.simon.com/mall/town-center-at-cobb/stream/southeast-classic-yo-yo-championship-3524700

"The Sound of Music" Sing-Along. 1 p.m. Aug. 2. $15. Fox Theatre, 660 Peachtree St. N.E., Atlanta. foxtheatre.org.  Read more about the Fox Summer Film  Festival lineup here.

"Bruce Munro: Light in the Garden." A British artist famed for using light as an artistic medium, Munro will create six site-specific installations around the Atlanta Botanical Garden and its conservatories, some set to music. Runs through Oct. 3. $22.95, $15.95 ages 3-12 on Fridays-Saturdays; $19.95, $13.95 children on Wednesdays-Thursdays and Sundays. 1345 Piedmont Ave. N.E., Atlanta. 404-876-5859, atlantabotanicalgarden.org.