From a relatively young age Icelandic children are told the story of Grýla, the ogress living in the Icelandic mountains. She is a dreadful character, described as part troll and part animal and the mother of 13 precocious boys (the Yule Lads). Grýla lives in the mountains with her third husband, her thirteen children and a black cat. Every Christmas, Grýla and her sons come down from the mountains: Grýla in search of naughty children to boil in her cauldron and the boys in search of mischief. She can only capture children who misbehave but those who repent must be released.
The Icelandic Christmas period is an intriguing mixture of religious practice and traditional folklore, beginning on 23 December and ending on Epiphany, 6 January. As many countries do, Iceland celebrates Chrismas mostly with good food and gifts to loved ones, but unlike most countries that have a single Father Christmas / Santa Claus character, Icelandic children are fortunate enough to be visited by 13 Yule Lads. Other Christmas stories are rather bleak in nature, perhaps reflecting the harshness of winter and the isolation of the community in previous centuries.
Icelandic children place a shoe in their bedroom window each evening in the 13 days before Christmas. Every night one Yuletide lad visits, leaving sweets and small gifts or rotting potatoes, depending on how that particular child has behaved on the preceding day. Each Yuletide lad has a specific idiosyncrasy and will therefore behave in a particular manner.