The folks at Bits From Bytes have an interesting giveaway taking place this holiday season: their Advent Calendar 2011. According to Wikipedia, an Advent Calendar is "a special calendar which is used to count or celebrate the days of Advent in anticipation of Christmas". Typically it involves a surprise each day, and BFB is doing just that.
Each day on their web page they will offer a unique printable 3D model for free download. Of course, all have a Christmas theme, but that goes with the territory here. They're pretty, cute, Christmasy and sometimes even useful, particularly the cookie cutters.
Enjoy, and thanks BFB!