Harmony Museum on Mercer Street in Harmony, offers regular 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.

<B>Pittsburgh Children's Museum</B>, 10 Children's Way, Allegheny Square, hosts Saltworks Theater Company in "Take 5!" at 1 and 2:30 p.m. Saturday. In the show, Couchy the Couch Potato Dog and his friends fight the temptations of Professor Junkett's video games and sugary snacks. Cartooning workshops are planned for 1 and 2 p.m. Sunday. Regular hours are 10 a.m. to 5 p.m. Mondays to Saturdays and noon to 5 p.m. Sundays. Admission is $9 for children ages 2 to 18 and senior citizens, and $10 for adults. Children younger than 2 are admitted free. Call 412-322-5058.<B>Carnegie Museum of Natural History</B>, 4400 Forbes Ave., Oakland, hosts "Dinosaurs in Their Time." Hours are 10 a.m. to 5 p.m. Tuesdays through Saturdays, with additional hours until 8 p.m. Thursdays, and noon to 5 p.m. Sundays. Closed major holidays. Regular admission, which includes the Carnegie Museum of Art, is $15 for adults, $12 for senior citizens, and $11 for students and children age 3 and older, and free for members and children younger than 3. Call 412-622-3131 or visit the Web site, www.carnegiemnh.org.<B>Carnegie Science Center</B>, One Allegheny Ave., North Side, hosts Space Out! Friday through Sunday, featuring telescopes, star clocks, lunar displays and star-studded planetarium shows. 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. Admission is $14 for adults and $10 for senior citizens age 62 and older and children 3 to 18. Parking is $3. Call 412-237-3400 or visit the Web site, www.carnegiesciencecenter.org.<B>Heinz History Center</B>, 1212 Smallman St., features "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 ages 6 to 18, and free for children younger than 6. Call 412-454-6000.