First Lady Michelle Obama welcomes children to begin decorating cookies, after welcoming military families who were the first to view the 2011 White House holiday season decorations. 37 Christmas trees decorate the White House, and the official White House tree stands 18 feet, 6 inches and is a balsam fir from the Schoeder's Forevergreens near Neshkoro, Wis. Photo by Jack Gruber, USA TODAY.