The tiny Santa hats are very simple to make.
With white fingering-weight sock yarn, cast on 9 sts onto 3 size 1 or 2 dpns, and join in a rnd.
Purl one rnd.
Switch to red sock yarn, and knit 2 rnds.
Next rnd: [k2tog, k1] 3 times (6 sts)
Knit 2 more rnds, then break yarn and draw through sts with a tapestry needle.
For pom pom, thread white yarn through top of hat several times, crisscrossing over the six stitches that you pulled together to close the end. (I made more of these stitches on the hat on the left for a bigger pom pom.)
Weave in loose ends, and now you have a Santa topper for your Snail or Slug!