Harmony Museum on Mercer Street in Harmony, representing the town founded in 1804 by pacifist German Lutheran Separatists and their Harmony Society, has regular guided museum tours from 1 to 4 p.m. daily except Mondays and holidays. Reservations are suggested for weekends and required for groups. Call 724-452-7341 or 888-821-4822, or visit the website www.harmonymuseum.org.

Carnegie Science Center, next to Heinz Field on the North Side, will feature Marty Ashby of Manchester Craftsmen’s Guild playing from 2 to 3 p.m. Saturday as part of the exhibit “Guitar: The Instrument That Rocked the World.” The performance is free with regular admission, which 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, cost extra. The Science Center is open regularly from 10 a.m. to 7 p.m. Saturdays and 10 a.m. to 5 p.m. Sundays through Fridays. Call 412-237-3400.Phipps Conservatory and Botanical Gardens at One Schenley Park presents its summer flower show “Fountains of Youth” through Sept. 30. Visitors can explore the healing powers of plants along with the soothing sights and sounds of fountains and bright blooms. Phipps is open daily from 9:30 a.m. to 5 p.m. and until 10 p.m. Fridays. Admission costs $12 for adults; $11 for senior citizens age 62 and older 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 as part of a new exhibition, “The Story of Negro League Baseball: We Are the Ship,” through Aug. 26. History Center 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. Hours are 10 a.m. to 5 p.m. daily. 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. Summer museum hours are 10 a.m. to 5 p.m. daily; closed holidays. New admission prices are $13 for adults, $12 for children ages 2 to 18 and senior citizens, and free for children younger than 2. Parking is $5; on-street, metered parking also is available. Call 412-322-5058 or visit www.pittsburghkids.org.ToonSeum, Pittsburgh’s Museum of Cartoon Art at 945 Liberty Ave., presents “Pearls Before Swine: The Art of Stephan Pastis” through Sept. 30. Regular admission is $4 for adults and free for children age 12 and younger. Museum hours are 10 a.m. to 3 p.m. Wednesdays and Thursdays, 10 a.m. to 5 p.m. Fridays and Saturdays and 11 a.m. to 4 p.m. Sundays; closed holidays. Call 412-232-0199 or visit www.toonseum.org.