FINDING NEMO -- Wednesday-Oct. 24. Disney On Ice performs the undersea adventure. George Mason University, Patriot Center, 4400 University Dr., Fairfax. $15-$60. 202-397-7328.
I WAS A TEENAGE ZUCCHINI -- Opens Friday. Through Oct. 31. Dr. Felix Frankenfud and his nephew Andy discover a genetic breakthrough to grow super-sized vegetables, but their plans backfire when Andy turns into a giant zucchini. Thomas Jefferson Community Theatre, 125 S. Old Glebe Road, Arlington, VA. $10; children $8. All kids wearing Halloween costumes get a prize. 703-548-1154.
THE LIGHT OF EXCALIBUR -- Opens Friday. Through Nov. 7. Merlin the magician travels to the future to help a teenager named Agnes with her problems and at the same time obtain some modern knowledge. Kennedy Center, Theater Lab, 2700 F St. NW. $14. 202-467-4600.
BOO AT THE ZOO -- Friday-Oct. 24, 5:30-8:30 p.m. Trick-or-treat at the zoo's 40 treat stations and walk through haunted trails and animal houses. National Zoo, 3001 Connecticut Ave. NW. $23, register at: www.nationalzoo.si.edu/ActivitiesAndEvents/Celebrations/Boo/. 202-673-4717.
INCREDIBLE FEETS -- Oct. 24 at 3 and 4:30 p.m. Footworks Percussive Dance Ensemble blends comedy, singing and dance in the Appalachian folk tradition. Smith Theatre, Howard Community College, 10901 Little Patuxent Parkway, Columbia. $9. 410-480-9950.
BUNNICULA -- Through Nov. 7. A musical comedy about a vampire bunny based on the book by Deborah and James Howe. Imagination Stage, Lerner Theatre, 4908 Auburn Ave., Bethesda. $10-$15. 301-280-1660.