I mixed blue enamel paint with the Crayola Pearl It! mixing medium (which I am in love with, by the way). I placed the paint inside and shook it until there were no clear spots left.
I also put white fingerprints on the bottom for snow and then decorated each snowman. I used enamel paint because it doesn't scratch as easily and for even more protection you could also spray with a clear sealant. I debated on putting our last name with the word family (ex: The Smith Family), but ended up just painting the year.