Huldufolk

http://weirdthings.com/2011/07/icelandic-town-under-siege-by-rock-throwing-elves-and-hidden-folk/

http://worldnews.nbcnews.com/_news/2013/12/22/22009310-icelands-hidden-elves-delay-road-projects?lite

http://not-about-books.blogspot.com/2011/12/yule-calendar-18-days-to-go-and-today.html

http://en.wikipedia.org/wiki/Hulduf%C3%B3lk

Just waiting for the Yule Lads to show up.