Here's looking at you, kids.
For unknown reasons, someone in northern Europe is leaving odd gifts for people all over the place - carved stone heads with rhymes taped to them. Each head (face, really) is carved into a large rock, about one foot in height, and from looking at the pictures of the faces they've been finding, they're very well done. Not exactly life-like, mind you (a little stylized), but each is unique and recognizable. So far 13 of them have been left on the doorsteps of random people, and each has been at least 100 miles from the others.
Supposedly, one of Britain's public securicams recorded the unknown prankster leaving one of the stones, but nothing more's been said along those lines.