Old Stone House hosts a program from 10 a.m. to 4 p.m. July 14 and 15 about what life was like in the late 18th and early 19th centuries. Reenactors will present information and demonstrations on animal trapping and trading, tomahawk and knife throwing, blacksmithing and general survival skills from the frontier days in Western Pennsylvania. A food demonstration and tasting will be offered inside the museum. A $3 per person, or $5 per family donation is requested. Old Stone House is at the intersection of Routes 8, 528 and 173. Call 724-738-4964 or 724-738-2409.

Harmony Museum on Mercer Street in Harmony will reprint “Window on the Past, a Look Back at 19th Century Life in Harmony and Zelienople.” The soft-cover, 107-page edition contains 32 black-and-white illustrations, and can be purchased for $15 at the museum shop, 222 Mercer St., and online at www.harmonymuseumshop.org. Proceeds benefit the nonprofit historical society that operates the eight-property Harmony Museum.

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. Admission is $10 for adults, $9 for seniors, $5 for students and children ages 6 to 17, and free for children age 5 and younger. The center is open daily from 10 a.m. to 5 p.m. Call 412-454-6000 or visit www.heinzhistorycenter.org.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 Pittsburgh singer-songwriter Bill Deasy, formerly of The Gathering Field. “Tech Tours” of the USS Requin submarine will be held 9 to 11 a.m. July 15 and 29 and Aug. 12 and 26. Participants must be 15 or older. Cost is $20 and reservations are required. 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 of the submarine, cost extra. Call 412-237-3400.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.National Aviary, 700 Arch St., has opened a new burrowing owl exhibit that shows the baseball-sized owls, native to the Western United States and South America, in their underground burrows. Also open is “Parrots of the Caribbean” in the Helen M. Schmidt FliteZone Theater, and the aviary’s rooftop Sky Deck theater features birds of prey in free-flight demonstrations. The public can view the newly hatched African penguin chicks twice daily at 11 a.m. and 2:30 p.m. at the Penguin Point exhibit. 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 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 or visit www.pittsburghkids.org.