This cottage complex is right at Santa's Napapiiri home, Santa Claus Village. It's run out of an enormous souvenir shop (there's a Santa in here too), but helpful staff can arrange all sorts of activities. Cottages offer modern, spacious hotel-standard rooms with saunas and kitchenettes, and are semi-detached with connecting doors, so families can rent them in their entirety.
Staff will collect you from the airport, but a car can be a good idea so as not to be stuck out here. Prices are high in December and New Year but include half-board.