Take your Krazy glue and run a thin line of it around the edge of your mason jar lid ring. You can also use hot glue.
Set 1/2 of one of the fillable ornaments right on the glue to form your dome. Just place the ornament dome right on the glue and leave it to sit for a couple of minutes to dry. (If you have the one with the plastic tab just use scissors to cut it off.
Krazy Glue or hot glue one of the mini ornaments to the mason jar lid along with a cotton ball that you pull apart. You can also just use fake snow, but I didn't have any. You can even use some snow confetti.
Just place your dome on the mason jar lid and screw it down on your jar. You can decorate it with a piece of ribbon. That is it! It adds a bit of WOW to your Mason Jar Mixes.