The Cranberry Township Historical Society will host a program on the life of George Westinghouse at 2 p.m. Sunday in the Cranberry Township Municipal Building Council Chambers, 2525 Rochester Road. Ed Reis, a Westinghouse historian, will perform living history, dressed in periodic garb to portray Westinghouse, an inventor, American entrepreneur and engineer. The program is free. Call 724 776-6551 or visit the Web site, www.explorecranberry.org.

Harmony Museum on Mercer Street in Harmony, presents Historic Harmony's 42nd Harmoniefest on Saturday in Stewart Hall at the museum. Admission is by reservation. Call 724-452-7341 or 800-821-4822.

<B>Carnegie Science Center</B>, One Allegheny Ave., North Side, has opened the Guitar Hero Electric Lounge, featuring eight giant screens, a concert-quality sound system and lighting effects, running 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>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 rates are $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 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, and free for children younger than 6. 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. A Healthy Smile Day is planned for 10 a.m. to 3 p.m. Saturday. A Family Dance Party is set for 1 to 3 p.m. Saturday. 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.