Harmony Museum on Mercer Street in Harmony is open from 1 to 4 p.m. daily; closed 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>National Aviary</B>, 700 Arch St., will offer a Pet Parrot Workshop, 10 a.m. to noon Feb. 20. Winter hours 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>Pittsburgh Children's Museum</B>, 10 Children's Way, Allegheny Square, presents weekend activities including a demonstration by the Pittsburgh Area Jitterbug Club from 2 to 3 p.m. Saturday and an Advanced City-Building Workshop from 2 to 2:45 p.m. Saturday. The "Yinz Play!" exhibit continues through June 6. Celebrate all things Pittsburgh in this interactive exhibit where visitors can play with Pittsburghese, repair one of its renowned bridges, design their own fireworks display, or help build a large-scale model of the city. Children's Museum is open from 10 a.m. to 5 p.m. Mondays to Saturdays; and noon to 5 p.m. Sundays, except holidays. Admission is $11 for adults; $10 for senior citizens and children ages 2 to 18, and free for children younger than 2. Parking is $5 for nonmembers. Call 412-322-5058 or visit the Web site, www.pittsburghkids.org.<B>Heinz History Center</B>, 1212 Smallman St., continues "Pittsburgh: A Tradition of Innovation" celebrating Pittsburgh's impact on the world over the past 250 years, and "Behind the Scenes with the Pittsburgh Steelers: Photographs by Mike Fabus" plus "Forbes Field: A Century of Memories." 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>Carnegie Science Center</B>, One Allegheny Ave., North Side, has reopened SportsWorks, plus the Miniature Railroad & Village exhibit with the new replica of Fallingwater. 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 age 62 and older and children 3 to 12. Parking is $5. Call 412-237-3400 or visit the Web site, www.carnegiesciencecenter.org.