Bernard Meyer, executive director of the White House Historical Association, shows the White House Christmas ornament from 1990, top left; 1989, right; and 1986, bottom. This year's ornament, which sells for $11, is a bronze miniature of the Blue Room as it looked at Christmas 150 years ago, when Martin Van Buren was president. The non-profit association's souvenir shop is doing a booming business in the ornaments.