O.C. Calendar of Events

Today

Theater: “MacHomer: the Simpsons Do Macbeth,” written and performed by Rick Miller. $20-$35. 8 p.m. Irvine Barclay Theatre, 4242 Campus Drive, Irvine. (949) 854-4646.

Gingerbread science: “The Science of Gingerbread” features a display of more than a dozen gingerbread structures. Included are cooking demonstrations, talks by architects about gingerbread structures, and more. 10 a.m.-5 p.m., through Jan. 7. Adults $12.95, seniors and children $9.95, children ages 2 and under free. Discovery Science Center, 2500 N. Main St., Santa Ana. (714) 542-2823 or

www.discoverycube.org

Skateboarding: Jingle Bell Jump features top-ranked Southern California skateboarders using a custom-built ramp to jump over an 8-foot Christmas tree. Snow area, carnival games and a photo with Santa are included. Noon-3 p.m. State College and Lincoln avenues in Anaheim. (760) 630-6687 or www.newmarkmerrill.com

Saturday

Hike: Take a 3- to 4-mile walk through the Donna O’Neill Land Conservancy. 9 a.m.-noon. Adults $10, children $5. 28672 Ortega Highway, San Juan Capistrano. (949) 489-9778.

Cleanup: Save Our Beach, in conjunction with Surfrider/Seal Beach, holds a beach cleanup. 11 a.m.-2 p.m. 1st Street beach parking lot, 1st Street and Ocean Avenue, Seal Beach.

www.saveourbeach.org

Sunday

Holiday fair: The annual Swedish Christmas Fair features handicrafts, food and Swedish Christmas carols. 11 a.m.-5 p.m. Adults $5, children 5 to 15 $2. Costa Mesa Neighborhood Community Center, 1845 Park Ave. (949) 716-0515 or www.swea.org

Singalong: Sing along with the master chorus and orchestra in Handel’s Messiah Sing-Along. 2 p.m. Free. Richard Nixon Library & Birthplace, 18001 Yorba Linda Blvd., Yorba Linda.

Collector exhibit: Crossroads of the West Gun Show. Sat. 9 a.m.-5 p.m.; Sun. 9 a.m.-4 p.m. Adults $12, seniors $11, children under 12 admitted free with adult. Orange County Fairgrounds, 88 Fair Drive, Costa Mesa. (801) 544-9125 or www.crossroadsgunshow.com

Ongoing

Illustration exhibit: “Picture This: Five Centuries of Book Illustration” looks at the different printing processes. Through March. UC Irvine’s Langson Library, W. Peltason and Pereira drives. Call for gallery hours (949) 824-5300.

Eco-friendly art: Karl Momen’s work addresses environmental and ecological issues. Through December. 384 Forest Ave., Laguna Beach. Mon.-Fri., 11 a.m.-6 p.m. (949) 306-9640.

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The Orange County calendar is compiled by Yvonne Villarreal. Submit items two weeks in advance to ocdesk@latimes.com or by fax to (714) 966-7711.