Providence Plantation, 300 Textor Hill Road, Evans City, will host "The Ohio Company and the Land: Igniting Conflict Between Three Nations" from 5 to 8 p.m. Saturday. Call for reservations. Call 724-538-8818.

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 11 a.m. to 3 p.m. Sept. 19 during the Butler Fall Festival. Admission is $5 for adults, $2 for children ages 5 to 17, and free for those younger than 5. Call 724-283-8116.

The Little Red Schoolhouse on East Jefferson Street directly behind Butler Junior High School will be open from noon to 3 p.m. Sept. 19 during the Butler Fall Festival. Admission is $3 for adults, $1 for youth ages 5 to 17, and free for children younger than 5. Call 724-283-8116.

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>Pittsburgh Children's Museum</B>, 10 Children's Way, Allegheny Square, presents "Bob the Builder — Project: Build It" through Sept. 27, although the museum will be closed Sept 24 and 25 due to the G20 Summit. 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 the new Penguin Point exhibit. 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.<B>Heinz History Center</B>, 1212 Smallman St., recently opened "Behind the Scenes with the Pittsburgh Steelers: Photographs by Mike Fabus," which continues 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 continues "Life in the Gardens: Fräbel Glass at Phipps" through January 2010. This exhibit features the 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 is $10 for adults, $9 for seniors 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 www.phipps.conservatory.org.<B>Carnegie Museum of Natural History</B>, 4400 Forbes Ave. in Oakland, continues "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, such as Memorial Day and Fourth of July. Regular admission, which includes the Carnegie Museum of Art, is $15 for adults, $12 for senior citizens, and $11 for students and children age 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>Carnegie Science Center</B>, One Allegheny Ave. next to Heinz Field on the North Side, is open 10 a.m. to 7 p.m. Fridays and Saturdays and from 10 a.m. to 5 p.m. Sundays through Thursdays; closed holidays. Regular admission is $14 for adults and $10 for senior citizens age 62 and older and children 3 to 12. Parking is $3. Call 412-237-3400 or visit the Web site, www.carnegiesciencecenter.org.

<B>"A Visit With Mr. Lincoln"</B> as performed by Jim Getty will take place at 2 p.m. Sunday at the Crawford Center on Hill Street, Emlenton. Tickets in advance cost $4 for adults and $2 for children in kindergarten through 12th grade. Tickets at the door will be $5 and $3, respectively. Proceeds will benefit The Pumping Jack Museum in Emlenton. Call 724-867-9471.