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. Sundays during November and December (except Dec. 20). The William A. Lowry Family exhibit is open for viewing. Lowry was a prominent Butler citizen who was a Civil War veteran and community leader. He married Annie Zeigler, daughter of politician Jacob Zeigler. Admission is $5 for adults, $2 for children ages 5 to 17, and free for those younger than 5. Call 724-283-8116.

Harmony Museum on Mercer Street in Harmony will host a scenic hike and "history party," commemorating George Washington's travels through Butler Country in 1753, on Nov. 27. The day starts and ends with Harmony Museum tours and a hot apple cider and cookies reception in the museum's Stewart Hall on the diamond. Event hours are 10 a.m. to 3 p.m., with hike departures scheduled for 11 and 11:45 a.m. and 12:45 p.m. Cost is $5 per person or $12 per family. The museum says reservations are encouraged. Call 724-452-7341.

<B>Old Economy Village</B>, Route 65, Ambridge, is taking reservations through Friday for its Tante Kringle's Bakeri program planned for 10 a.m. to 12:30 p.m. Nov. 28. Children ages 6 to 12 can experience Tante's Berliners or donuts as Tante makes one "special" for each child. All will receive a ragball with little trinkets and candy inside. Belsnickel, helper to St. Nicholas, will be in attendance. Admission is $22.50. Call 724-266-4500, Ext. 101.pittsburgh<B>Heinz History Center</B>, 1212 Smallman St., will celebrate "Heritage Holidays" featuring live entertainment and family activities that showcase regional ethnic customs from 11 a.m. to 3 p.m. Saturday and Sunday. This event is free with History Center admission. The center is also showing "Behind the Scenes with the Pittsburgh Steelers: Photographs by Mike Fabus" through January. 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>ToonSeum</B>, Pittsburgh's Museum of Cartoon Art, opened its new space at 945 Liberty Ave. in the Cultural District. The ToonSeum is one of only three museums in the nation dedicated exclusively to the cartoon arts. Admission is $4 for adults and $3 for children ages 5 to 17; children younger than 5 are admitted free. Visit the Web site, www.toonseum.org.<B>Pittsburgh Children's Museum</B>, 10 Children's Way, Allegheny Square, is presenting "Tough Art" through Jan. 10; plus classes in baby yoga, clay art and cartooning. 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>Phipps Conservatory and Botanical Gardens</B> in Schenley Park continues "Life in the Gardens: Fräbel Glass at Phipps" through January. This exhibit features the work 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. 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., Oakland, is hosting the exhibition "Whales/Tohora" through May 2. The interactive exhibit brings visitors eye-to-eye with some of the world's most elusive creatures. Museum 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. 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.