Harmony Museum, MercerStreet, Harmony, offers guided tours from 1 to 4 p.m. daily except Mondays. Reservations are suggested for weekends and required for groups. Call 724-452-7341 or 888-821-4822; visit www.harmonymuseum.org.

<B>Old Economy Village</B> opens Saturday<B> </B>featuring a weekend-long admission of $1 per person. A new and permanent exhibit, “19th Century Textile Manufacturing,” will be on view. The site will be open from 10 a.m. to 5 p.m. Saturday and from noon to 5 p.m. Sunday. The visitor center exhibits as well as guided tours of the village's primary 19th century buildings will be available from Saturday through Dec. 31. Craftsmen will demonstrate their historic trades during the opening weekend and on specified weekends throughout the year. Call 724-266-4500 or visit www.old-economyvillage.org.

<B>Children's Museum</B>, 10 Children's Way, Allegheny Square, hosts “Whoosh! It's All About Air” through May 29. Create a silkscreen, press a monoprint or paint a masterpiece to live music performed by ensembles from the Center for Young Musicians at 11:30 a.m. Saturday. Musicians from the Pittsburgh Symphony Orchestra will perform at 1 p.m. Saturday. A family dance party is set for 2 to 4 p.m. Sunday. 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 children ages 2 to 18 and senior citizens, and free for children younger than 2. Parking is $5 for nonmembers or $3 for members. Call 412-322-5058 or visit www.pittsburghkids.org.<B>Carnegie Science Center, </B>North Side, hosts regional students who want to explore careers in science, technology, engineering and math during SciTech Days through Friday. Center hours are 10 a.m. to 5 p.m. Sundays through Fridays and 10 a.m. to 7 p.m. Saturdays. Admission is $17.95 for adults and $9.95 for children ages 3 to 12. Omnimax films are extra. Call 412-237-3400; visit www.carnegiesciencecenter.org.