Penn's Colony Festival will feature artists and musical entertainment reminiscent of the historic time period of the French and Indian War on Saturday and Sunday and Sept. 26 and 27 on the festival grounds on Saxonburg Boulevard near Saxonburg. Hours are 11 a.m. to 5:30 p.m. Saturdays and 11 a.m. to 5 p.m. Sundays. Admission is $6.50 for ages 16 to 59, $5.50 for those age 60 and older, $4.50 for ages 8 to 15, and free for children younger than 8. On-site parking is free. Call 724-352-9922 or visit the Web site, www.pennscolony.com.

The Little Red Schoolhouse on East Jefferson Street directly behind Butler Junior High School will be open from noon to 3 p.m. Saturday during the Butler Fall Festival. Admission is $3 for adults, $1 for youths ages 5 to 17, 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 11 a.m. to 3 p.m. Saturday 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.

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, continues "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 10 a.m. to 5 p.m. Mondays through Saturdays and noon to 5 p.m. Sundays, although the museum will be closed Sept. 24 and 25 due to the G20 Summit. 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. "Lincoln: The Constitution and the Civil War and Lincoln Slept Here" continues through January as well. 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. 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 rates are $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 Science Center</B>, One Allegheny Ave., 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.