Cooper Cabin Pioneer Homestead, 199 Cooper Road, Cabot, will host its third annual Civil War Living History Weekend from noon to 5 p.m. Saturday and Sunday. Re-enactors of the Pennsylvania 78th dressed in both Confederate and Union gear and uniforms will set up camp and conduct light skirmishes, picket posts, drills, a small march and hold interactive talks. Civilian re-enactors will also be present and will be selling raffle tickets on a painting of Major General Joshua Chamberlain. Docent-led tours of Cooper Cabin will also be available. Admission is $5 for adults, $3 for ages 5 to 17 and senior citizens, and free for children younger than 5. Call 724-283-8116.

Butler County Heritage Center, 119 W. New Castle St., celebrating the 150th anniversary of the birth of the oil industry with two exhibits, will be open from noon to 4 p.m. Fridays during August. Admission is $5 for adults, $2 for children 5 to 17, and free for those younger than 5. Call 724-283-8116.

Lowrie/Shaw House, 123 W. Diamond St., built in 1828 by Butler's only United States senator, will be open from noon to 4 p.m. Wednesdays and Fridays, with the last tour beginning at 3 p.m., during August. Admission is $3 for adults, $1 for ages 5 to 17, and free for age 5 and younger. The house museum is located at 123 W. Diamond Street, directly behind the Butler County Courthouse. Call 724-283-8116.

Harmony Museum on Mercer Street in Harmony is displaying "The First Shot," Deac Mong's painting depicting a "French Indian" firing the first shot of the French and Indian War at young Virginia Maj. George Washington near Harmony in 1753. Regular guided tours are offered 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 Web site, www.harmonymuseum.org.

<B>Heinz History Center</B>, 1212 Smallman St., opens ""Behind the Scenes with the Pittsburgh Steelers: Photographs by Mike Fabus," including a special exhibit of all six Steelers' Super Bowl Trophies, on Friday. The trophies will be displayed only through Aug. 30. The photograph exhibit will run through January. History center hours are 10 a.m. to 5 p.m. daily, except holidays. Admission is $10 for adults, $9 for senior citizens age 62 and older, $5 for students with ID and for children ages 4 to 17, and free for children 3 and younger. Call 412-454-6000.<B>Phipps Conservatory and Botanical Gardens</B> in Schenley Park is hosting the fifth annual tomato and garlic festival "Red, Ripe and Roasted" from 11 a.m. to 5 p.m. Sunday in Phipps' outdoor garden in Schenley Park. This year's festival will feature cooking demonstrations, a variety of delicious tastings and a tomato judging contest. Admission to the festival is free, and visitors who take fresh produce to benefit the Greater Pittsburgh Community Food Bank will also receive free admission to the conservatory. Phipps is open from 10:30 a.m. to 4 p.m. Mondays through Thursdays, 10:30 a.m. to 10 p.m. Fridays, and 9:30 a.m. to 5 p.m. Saturdays and Sundays. Regular admission is $10 for adults, $9 for senior citizens age 62 and older and students with ID, and $7 for children ages 2 to 18. Phipps members and children younger than 2 are admitted free. Call 412-622-6914 or visit the Web site, www.phipps.conservatory.org.<B>Pittsburgh Children's Museum</B>, 10 Children's Way, Allegheny Square, will present Play with Professor MiGooch, Professor of Fun, throughout the museum from 10 a.m. to 12:30 p.m. Friday. "Bob the Builder ¿ Project: Build It" continues through Sept. 27. Regular museum hours are 10 a.m. to 5 p.m. Mondays to Saturdays; and noon to 5 p.m. Sundays. Admission is $11 for adults; $10 for senior citizens and children ages 2 to 18, and free for children younger than 2. Call 412-322-5058 or visit the Web site, www.pittsburghkids.org. <B>National Aviary</B>, 700 Arch St., presents FliteZone at 11:30 a.m. and 2:30 p.m. Wednesdays through Sundays through Labor Day, Sept 7, weather permitting. A birding walk is planned at 10:30 a.m. daily. The new Penguin Point is open. Aviary hours are from 9 a.m. to 5 p.m. daily through Sept 7. Admission is $10 for adults; $9 for senior citizens; $8.50 for children ages 2 to 12; and free for children younger than 2. Call 412-323-7235 or visit the Web site, www.aviary.org.