Harmony Museum, Mercer Street, Harmony, offers tours from 1 to 4 p.m. daily except Mondays. Reservations are suggested for weekends and required for groups. Call 724-452-7341 or 888-821-4822, or visit www.harmonymuseum.org.

Meadowcroft Rockshelter and Historic Village, 401 Meadowcroft Road, Avella, features a 16,000-year-old rock overhang used by the region's earliest inhabitants for shelter, plus the Historic Village recreates an upper Ohio Valley village from the mid-19th century. Hours are noon to 5 p.m. Wednesdays through Saturdays and 1 to 5 p.m. Sundays. Admission is $10 for adults, $9 for senior citizens, $5 for children ages 6 to 17, and free for children under 6. Call 724-587-3412.

Carnegie Science Center, North Side, continues to present acoustic musical performances in association with the exhibit “Guitar: The Instrument That Rocked the World.” Performing from 2 to 3 p.m. Saturday will be guitarist Joe Negri. “Tech Tours” of the USS Requin submarine will take place from 9 to 11 a.m. Sunday, and Aug. 12 and 26; call 412-237-1637. Regular admission is $17.95 for adults and $11.95 for children ages 3 to 12. Most activities are included in the admission price, but some, like Omnimax films and the Tech Tours, cost extra.Phipps Conservatory and Botanical Gardens at One Schenley Park presents its summer flower show “Fountains of Youth” through Sept. 30. Phipps is open daily from 9:30 a.m. to 5 p.m. and until 10 p.m. Fridays. Admission is $12 for adults; $11 for senior citizens and students with ID; $9 for children ages 2 to 18; and free for children younger than 2. Call 412-622-6914 or visit phipps.conservatory.org.Heinz History Center, 1212 Smallman St., is displaying nearly 50 paintings and sketches depicting the lives of Negro League baseball players in “The Story of Negro League Baseball: We Are the Ship,” through Aug. 26. Admission is $10 for adults, $9 for visitors age 62 and older, $5 for students and children ages 6 to 17, and free for children age 5 and younger. Call 412-454-6000 or visit www.heinzhistorycenter.org.National Aviary, 700 Arch St., has a new burrowing owl exhibit, as well as “Parrots of the Caribbean” and the rooftop Sky Deck theater featuring birds of prey in free-flight demonstrations. The aviary is open daily from 10 a.m. to 5 p.m. Admission is $13 for adults, $12 for senior citizens, $11 for children ages 2 to 18, and free for children younger than 2. Call 412-323-7235 or visit www.aviary.org.Children’s Museum, 10 Children’s Way, Allegheny Square, presents “The Wizard of Oz Children’s Educational Exhibition” through Sept. 2. Hours are 10 a.m. to 5 p.m. daily. Admission is $13 for adults, $12 for children ages 2 to 18 and senior citizens, and free for children younger than 2. Call 412-322-5058.