Relive the wonder of childhood holidays at the Winter Wonderland Train Show on the third floor of the Center for the Arts at the Historic Candy Factory, 9419 Battle St. The National Capital Trackers will set up their O gauge trains amid an elaborate winter fantasy background for this annual display. The show is open free from Dec. 13 to 17, Wednesday through Friday, 5-8 p.m., Saturday 10 a.m. to 5 p.m., and Sunday 10 a.m. to 4 p.m.  In conjunction with the train show, the Military Child Education Coalition will remember and honor the sacrifices of the brave sons and daughters of military parents in a display at the Center for the Arts.