Ask HN: Share your favorite Christmas gimmicks

There must be hundreds of us having build xmas gimmicks, cards and animations. Share your best ones! Also share classics that you liked over the years. And have a peaceful, cozy time and happy holidays wherever you are!

(My attempt this year was to see how far brute forcing could get me with the limitation of a single html file, no frameworks, images or webgl: https://xe.dev/xmas )