Have you thought about giving your players a small gift to celebrate the yule holiday? This post will give you an idea that I utilized that I think you might like. What you’ll need is a printer, some print-capable card stock, and Avery (or similar) business card paper for your printer. Also some sort of PDF reader!
The central part of this gift idea are a small set of cards you can print out and give to your players. These cards can be turned in to you, the DM, in exchange for a small effect. There are also trinket cards that are small magical items with no hard mechanics but which might be utilized in creative ways. (The PDFs of these cards are near the bottom of this post.)