The results of the North Pole Challenge are in and are available to play through in game. The next challenge is to build a Frozen themed Toy Box.
NorthHoleMiniGolf by Papa Echo, a Christmassy golf course
Saving Christmas by crazybynick, a tree climbing platformer
Winter Express by Princess Blinks, a wintry racetrack
Santa's Workshop by Enrem, a North Pole themed town to explore
Christmas Town by Kevin B, a Nightmare Before Christmas themed town to explore
Remember that they've already revealed the challenge that starts next week: