Every year at Christmas after his family has decorated the Christmas tree, my informants mother will hide a pickle shaped Christmas Ornament on the tree. The first of the children to find the ornament, and bring it to her, gets a special present from her.
My informants mother (who is the active bearer in his family for this tradition) is German, however he is not sure where this tradition originated. There are a number of possible explanations, including simply the fact that the green of the pickle ornament is hard to find amongst the green of a pine tree, and the fact that sending children on a search for a phallic object may be preparing them, at least on some level, for the sexual encounters they will have in the future. In any case, my informant just enjoys competing with his siblings for a chance at an extra present at Christmas time.