What are some items or symbols that are displayed in Christmas?

In Christmas decorations we often see a green wreath, stylized snowflakes, a star representing the Star of Bethlehem, decorative balls that just look good but don't symbolize anything, various depictions of Santa Claus, and for those who go in for the more serious type of decoration, a diorama depicting the baby Jesus in the manger, surrounded by the Three Magi and so forth.