Sandy from Around the Sims has been creating a new advent calendar filled with Sims downloads every Christmas (I think) for at least a decade. This year’s has just begun with the first download—Tiny Christmas Balls—available for both The Sims 3 and The Sims 4.
Keep an eye out for 24 more downloads for The Sims 3 and The Sims 4 every day until Christmas.