It's a Christmas Eve box (they get to open it on Christmas Eve)! They get new pjs (to wear that night), a Christmas movie, hot chocolate, snacks for the movie, etc. This would be an awesome new tradition.
HOW DID I NOT KNOW THIS EXISTED? Follow the link to access a database on lds.org with tons of cute quote handouts. They're organized by speaker! Don't forget to check out page 2 as well, it to me a while to realize that there was a second page! <3