Old Stone House will be the site of events for Halloween on Friday and Saturday. "Spooky Stories," a family-friendly tour featuring ghost storytelling, historical reenactments and paranormal investigation, will run from 5:30 to 7:30 p.m. Then from 8 to 10 p.m., a haunted house benefiting the Unionville Fire Department will be a bit scarier than the earlier event. Admission to Spooky Stories is free, through a $3 donation is suggested. The Haunted House has an admission fee of $5. Concessions will be available. The Old Stone House, owned and managed by Slippery Rock University, is at the intersection of Routes 8, 173 and 528. Call 724-738-4964.

Harmony Museum on Mercer Street in Harmony, offers 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.www.phipps.conservatory.org.

<B>Carnegie Science Center</B>, One Allegheny Ave., North Side, will focus on the creepy side of science on Saturday. Featuring Halloween-themed hands-on activities and programs, indoor trick-or-treating, and special theater demonstrations, Spooky Science is for children of all ages. Regular hours are 10 a.m. to 7 p.m. Fridays and Saturdays and 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>Pittsburgh Children's Museum</B>, 10 Children's Way, Allegheny Square, will host a Halloween costume parade at noon through Saturday. You can explore makeup design from 10 a.m. to 4 p.m. daily through Saturday. There will be a puppet show, "Haunts, Hoots & Howls!" by We're Holden Puppets and visitors can make their own monster puppets at 1, 2 and 3 p.m. Saturday. Regular 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., hosts Owl-O-Ween from 11 a.m. to 3 p.m. Saturday and is free for children 11 and younger in costume. During October — National Breast Cancer Awareness Month — a portion of proceeds from Flamingo Connection will be donated to the Susan G. Komen Breast Cancer Foundation. Flamingo Connection is available at 2:30 p.m. Wednesdays through Sundays. Cost is $30 and includes admission to the aviary. Call for reservations and restrictions. Regular fall/winter hours are from 10 a.m. to 5 p.m. Mondays through Saturdays and noon to 5 p.m. Sundays. 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., is 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>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. 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