There are now official images of the upcoming LEGO Seasonal Year of the Rat (40355) set. It has 162 pieces and you will be able to get it for free with purchases of $80 or more starting on January 13.
As you can see from the images below, there’s actually a lot of articulation with the Rat with the moveable ear, hands, and tail. Along with the set, you also get a “red” envelope where you can put money in and give to others.
The promotion will run until January 26, while supplies last.