Disclosure: I received complimentary products to facilitate this post. All opinions are my own.
Several years back, I had a friend with two kids who were just over a year apart. She wanted them to stop believing in Santa the same year. One year, her older son was starting to doubt Santa, but they wanted him to hang on just one more year so he wouldn't spoil it for their younger daughter. On Christmas Eve, the dad rang jingle bells late at night and put tracks in the snow outside, convincing the older son that Santa had been there.
If you've ever wanted to make the magic seem more real like that family, or just have a fun and unique holiday-themed decor, you can check out Hoppy Paws. This fun kit makes prints that are easy to clean with water, but look convincing to a kid. They have prints for many occasions: Easter Bunny, Leprechaun, Tooth Fairy, stork for baby arrivals, scary cat or monster for Halloween, and Santa's reindeer, elf, or boot. The prints are easy to apply, and fun for holiday-themed dinner party decorations too.