Providence Plantation, 300 Textor Hill Road, Evans City, will host an interactive book preview with author Carl Robertson on Saturday. Call for reservations. Call 724-538-8818.

Harmony Museum on Mercer Street in Harmony presents Historic Harmony's 42nd Harmoniefest on Feb. 14 in Stewart Hall at the museum. A concert of 19th century music will be performed by the 1830 Old Economy Orchestra and Old Economy Singers The annual dinner and historical program fundraiser benefits Harmony Museum operations. Admission is $25 and reservations are due by Friday. Call 724-452-7341 or 800-821-4822.

<B>Carnegie Science Center</B>, North Side, opens the Guitar Hero Electric Lounge, featuring eight giant screens, a concert-quality sound system and lighting effects, from 8 p.m. to midnight Saturdays in February and March. Tickets for the Electric Lounge are $8. Science Center visitors also can explore the popular musical video game every Saturday from 5 to 7 p.m. during the Guitar Hero Jam Session, which is free with general admission. Regular hours are 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 62 and older and children 3 to 18. Parking is $3. Call 412-237-3400 or visit the Web site, www.carnegiesciencecenter.org.<B>National Aviary</B>, 700 Arch St., hosts FliteZone inside for a new show running from 11 a.m. to 1:30 p.m. Wednesdays through Sundays. Flamingos have been added to the spectacle. Regular hours are 10 a.m. to 5 p.m. daily except Christmas. Regular admission is $10 for adults; $9 for senior citizens; $8.50 for children 2 to 12; and free for children younger than 2. Call 412-323-7235 or visit the Web site, www.aviary.org.<B>Phipps Conservatory and Botanical Gardens</B> in Schenley Park 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 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>Heinz History Center</B>, 1212 Smallman St., features its new exhibit, "Pittsburgh: A Tradition of Innovation," tracing Western Pennsylvania's imprint on the United States and the world. Hours are 10 a.m. to 5 p.m. daily, except holidays. Admission is $9 for adults, $7 for senior citizens older than 61, $5 for students with ID and for children 6 to 18. Call 412-454-6000.<B>Pittsburgh Children's Museum</B>, 10 Children's Way, Allegheny Square, hosts the traveling exhibit "Exploring Trees Inside and Out" through May 17. Regular museum hours are 10 a.m. to 5 p.m. Mondays to Saturdays; and noon to 5 p.m. Sundays. Admission is $9 for children 2 to 18 and senior citizens and $10 for adults; children younger than 2 are admitted free. Call 412-322-5058 or visit the Web site, www.pittsburghkids.org.