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 June. Admission is $5 for adults, $2 for children 5 to 17, and free for those 5 and younger. The center is owned and operated by the Butler County Historical Society. Call 724-283-8116.

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

Harmony Museum on Mercer Street in Harmony offers regular guided 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 Web site, www.harmonymuseum.org.

<B>National Aviary</B>, 700 Arch St., has opened its new Penguin Pointe and its free-flight FliteZone. An "Early Bird Special" will be offered at 8:30 a.m. Saturday, featuring a continental breakfast and live bird presentations. Cost is $18 for adults and $15 for children. Reservations are required. Call 412-323-7235 Ext. 209. The Aviary is open daily through Sept 7 from 9 a.m. to 5 p.m. Admission is $10 for adults; $9 for senior citizens; $8.50 for children 2 to 12; and free for children younger than 2. Visit the Web site, www.aviary.org.<B>Phipps Conservatory and Botanical Gardens</B> in Schenley Park continues its new exhibition, "Life in the Gardens: Fräbel Glass at Phipps" through January. This exhibit features the imaginative artistry of German-born artist Hans Godo Fräbel, a founding father of modern glass sculpture. Phipps is open daily from 9:30 a.m. to 5 p.m. and until 10 p.m. on Fridays. Admission rates are $10 for adults, $9 for seniors age 62 and older and students with ID, and $7 for children 2 to 18. Phipps members and children under 2 are admitted free. Call 412-622-6914 or visit www.phipps.conservatory.org.<B>Pittsburgh Children's Museum</B>, 10 Children's Way, Allegheny Square, will host "Bob the Builder ¿ Project: Build It" from Saturday through Sept. 27. Regular hours are 10 a.m. to 5 p.m. Mondays to Saturdays; and noon to 5 p.m. Sundays. Admission is $10 for children 2 to 18 and senior citizens and $11 for adults; children younger than 2 are admitted free. Parking is $5 for nonmembers in the museum's lots. Call 412-322-5058 or visit the Web site, www.pittsburghkids.org.<B>Carnegie Museum of Natural History</B>, 4400 Forbes Ave. in Oakland, has extended "The Horse" exhibition's run through July 5. Continuing is "Dinosaurs in Their Time." Hours are 10 a.m. to 5 p.m. Tuesdays through Saturdays, with additional hours until 8 p.m. Thursdays, and noon to 5 p.m. Sundays. Closed major holidays. Regular admission, which includes the Carnegie Museum of Art, is $15 for adults, $12 for senior citizens, and $11 for students and children 3 and older, and free for members and children younger than 3. Call 412-622-3131 or visit the Web site, www.carnegiemnh.org.

<B>The Pumping Jack Museum</B> is presenting Dennis Murray, who will give a first person talk as a Bucktail Civil War soldier, at 2 p.m. Sunday in the Crawford Center on Hill Street, Emlenton. Tickets are $3 for adults, $2 for children in kindergarten through grade 12, and free for preschoolers and younger. Tickets will be available at the door or call 724-867-9471.