The Hitchcock Presbyterian Church, at 6 Greenacres in Scarsdale, will be holding its annual Christmas Carol Sing-Along at 4 p.m. Dec. 16. A 20-member flut choir will begin playing 15 minutes early while people arrive. After the free concert, an outdoor Christmas tree will be lit. The audience in invited to the Children’s House for a Christmas party with refreshments and arts and crafts for the kids. The word is that Santa plans to drop by.