Saxonburg Area Artists Cooperative, 215 Main St., rear, Saxonburg, presents its holiday sale and show through Jan. 30. Admission is free. Gallery hours are noon to 8 p.m. Fridays and 10 a.m. to 8 p.m. Saturdays. Call 412-260-5779.

Carnegie Museum of Art, 4400 Forbes Ave., is displaying its decorated holiday trees, six fresh 20-foot Colorado spruce trees with the theme “Embracing the Art of Play,” through Jan. 12. The Neapolitan presepio Italian Nativity scene is on view through Jan. 9. New hours are 10 a.m. to 5 p.m. Mondays and Wednesdays through Saturdays and noon to 5 p.m. Sundays with extended hours until 8 p.m. Thursdays. Closed now Tuesdays instead of Mondays. Museum admission is $17.95 for adults, $14.95 for senior citizens, $11.95 for students and children ages 3 to 18, and free for children younger than 3. Admission after 4 p.m. on Thursdays is discounted. Call 412-622-3131 or visit www.cmoa.org.Silver Eye Center for Photography, 1015 E. Carson St., hosts “Pittsburgh Collects” showcasing an exhibition of 75 works contributed by three Pittsburgh photography collectors through Jan. 11. Gallery hours are noon to 6 p.m. Tuesdays through Saturdays. Admission is free. Call 412-431-1810 or visit www.silvereye.org.