The Christmas Eve box: include new pajamas, a Christmas movie or book, and special snacks (hot chocolate, popcorn, candy, etc). Let them open it on Christmas Eve and wear the pjs, watch the movie/read the book and eat the snacks.
Candy Cane heart shaped lollipop. Could do this for valentines, Xmas Christmas yule, anniversary, or even a birthday if they really like peppermint. Just bake at 300F for 3 minutes, then quickly shape like a heart around a lollipop sucker stick. You could fill the suckers with white chocolate and sprinkles too, but I like just the plain candy cane sucker hollow in the middle.