The penultimate entries of this year’s City, Friends, & Star Wars Advent calendars are a trio of sleighs, and in Christmas Build-Up a Christmas tree; I made a black bird MOC with the leftover parts.
The first of the three sleighs is in City, and it can be towed by yesterday’s snowmobile:
Similarly we get another one in Friends, that can be towed by yesterday’s pony:
In Star Wars we get a self-propelled one: