I made Christmas ball ornaments instead of hearts. I also added number tags and old buttons from Great Oma's button box.
The packages at the bottom of the calendar sport larger buttons and enough room for gifts or extra special love letters.
If you're interested in making one of these, I've made a tutorial to share with you. Just give me a shout. Also, in the new year, I'll be opening an Etsy shop and these will be one of the items I'll be offering for sale.