Harmony Museum, 218 Mercer St., Harmony will have a German buffet dinner Sept. 14 with seatings at 4:30 and 6:30 p.m. in Stewart Hall. Prepaid reservations are required. Call 724-452-7341.

Heinz History Center, 1212 Smallman St., will hold the second annual Hometown — Homegrown, a food expo, from 10 a.m. to 3 p.m. Saturday. Visitors can sample food from nearly 30 local vendors. Call 412-454-6000 or visit www.heinzhistorycenter.org.Carnegie Science Center, North Side, hosts a viewing of Dan Handley’s documentary, “Undaunted: The Forgotten Giants of the Allegheny Observatory,” in the Buhl Planetarium, starting at 6 p.m. Saturday. Center admission is $17.95 for adults and $11.95 for children ages 3 to 12. Visit CarnegieScienceCenter.org. Regular hours are 10 a.m. to 7 p.m. Saturdays and 10 a.m. to 5 p.m. Sundays through Fridays.Phipps Conservatory and Botanical Gardens, 1 Schenley Park, hosts Farmers at Phipps from 2:30 to 6:30 p.m. Wednesdays through the last week of October. The summer flower show runs through Oct. 6. Conservatory hours are 9:30 a.m. to 5 p.m. daily and until 10 p.m. Fridays. Admission is $15 for adults, $14 for senior citizens and students, and $11 for children ages 2 to 18. Call 412-622-6914 or visit phipps.conservatory.org.Carnegie Museum of Natural History, 4400 Forbes Ave., Oakland, presents “Roads of Arabia: Archaeology and History of the Kingdom of Saudi Arabia” through Nov. 3. Hours are 10 a.m. to 5 p.m. Tuesdays to Saturdays, with extended hours until 8 p.m. Thursdays, and noon to 5 p.m. Sundays. Admission is $17.95 for adults, $14.95 for senior citizens, and $11.95 for students and children ages 3 to 18. Admission after 4 p.m. on Thursdays is discounted. Call 412-622-3131 or visit www.carnegiemnh.org.