Lowrie-Shaw House, built in 1828 by Walter Lowrie, Butler's only United States senator, at 123 W. Diamond St., will be open noon to 4 p.m. Mondays and open as well from 10 a.m. to 2 p.m. Fridays. Admission is $3 for adults, $1 for those ages 5 to 17, and free for those younger than 5. Call 724-283-8116.

The Little Red Schoolhouse on East Jefferson Street directly behind Butler Junior High School is open by appointment. Call 724-283-8116.

<B>National Aviary</B>, 700 Arch St., welcomes a new penguin named Sidney, after Pittsburgh Penguin Sidney Crosby, on Saturday. The African penguin will greet visitors from 11:30 a.m. to 1 p.m., and again from 2:30 to 4 p.m. After his debut, Sidney will make appearances during the Aviary's regularly scheduled Flights of the North Shore and Penguin Premiere events, as well as during the summer outdoor bird show FliteZone. The National Aviary is open daily from 10 a.m. to 5 p.m. Admission is $9 for adults; $8 for seniors; $7.50 for children age 2 and older; and free for those younger than 2. Call 412-323-7235 or visit the Web site, www.aviary.org.<B>Carnegie Science Center</B>, One Allegheny Ave. next to Heinz Field on the North Side, hosts Kites for on April 26 and 27. "Bodies...The Exhibition" continues through May 4; an extra fee is assessed for this display. 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 to the science center is $14 for adults and $10 for senior citizens age 62 and older and children 3 to 18. Parking is $3; people not visiting the science center pay more. Call 412-237-3400 or visit the Web site, www.carnegiesciencecenter.org.<B>Heinz History Center</B>, 1212 Smallman St., presents "Pittsburgh Recast," featuring more than 50 pieces of work by members of the Pittsburgh Society of Illustrators through Sept. 7. "Formed and Fired: Three Ceramic Traditions" will be on display in the History Center's first floor McGuinn Gallery through May 18. Hours are 10 a.m. to 5 p.m. daily, except holidays. Regular admission includes both the History Center and Sports Museum and 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.