As the 22-year-old mother of two tried to get her friendly, rambunctious, four-year-old daughter to sit still at the dinner table, her five-year-old son sat counting. He was doing pretty well. He almost made it to 100, when Luritz Parker, a member of Chesapeake Conference’s Atholton church in Columbia, Md., interrupted to hand them three clear sandwich bags filled with soap, toothbrushes, toothpaste and wash cloths.