(3-8 yrs.) Celebrate the Halloween season with this outdoor event at Kidwell Farm. Play Halloween-themed games, go trick-or-treating to animals, and enjoy a wagon ride. Finish the evening with a small treat bag for the road. The program at Frying Pan Farm Park runs from 6:30 to 7:30 p.m. and again from 7:30 to 8:30 p.m. Reservations are required. The cost is $10 per person. For more information, call 703-437-9101.