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 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.

<B>Pittsburgh Glass Center</B> in the East End neighborhood of Friendship/Garfield, two blocks west of the Negley and Penn Avenue intersection, will host a free open house featuring heat defying acts of art in PGC's state-of-the-art glass studios from 6 to 9 p.m. Friday. Live glassblowing and flameworking demonstrations will be ongoing. A workshop for couples to make a glass flower is planned for Valentines Day, Feb. 14, from 5 to 9 p.m. Call ahead for a time slot. Call 412-365-2145, Ext. 201.<B>Heinz History Center</B>, 1212 Smallman St., presents "Pittsburgh Steelers 75th Season Celebration: Treasures from the Pro Football Hall of Fame" through Feb. 10. Hours are 10 a.m. to 5 p.m. daily, except holidays. 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, $5 for children ages 6 to 18, and free for children younger than 6. Call 412-454-6000.<B>Carnegie Museum of Natural History,</B> 4400 Forbes Ave. in Oakland, hosts "The Scoop on Poop!" through May 4. A blend of science and fun, the traveling exhibition based on the book of the same name by Dr. Wayne Lynch leads visitors on an investigation of how animals and humans use it to build homes, hide from enemies, attract mates, cool off, and other functions. "Dinosaurs in Their Time," an attendance record setting exhibit featuring newly posed skeletons, continues. Regular hours are 10 a.m. to 5 p.m. Tuesdays through Sundays. Closed Mondays and major holidays. 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. Call 412-622-3131.<B>The National Aviary</B>, 700 Arch St., is open seven days a week from 10 a.m. to 5 p.m. "Lories & Friends" is a new walk-through exhibit that features a flock of fearless and flashy rainbow lorikeets. Nectar is $2 per cup. Aviary admission is $9 for adults; $8 for senior citizens older than 60; $7.50 for children age 2 to 12, and free for children younger than 2. Call 412-323-7235, or visit the Web site, www.aviary.org.<B>Phipps Conservatory and Botanical Gardens</B> is not having a winter flower show this year because the display of Chihuly glass has been extended through Feb. 24. "Tropical Forest: Thailand" continues through 2008. The conservatory in Schenley Park is open from 9:30 a.m. to 5 p.m. every day, except Christmas Day. Admission is $12.50 for adults, $11.50 for seniors age 62 and older and for students with ID, $7.50 for children ages 2 to 18, and free for children younger than 2. Call 412-622-6914.