DIY advent calendar using favor tins and a free printable. You can put a small candy or toy inside, as well as a note announcing an advent activity. This would also work really well as a countdown calendar to anything--Disney World, Valentine's Day, etc.
DIY Christmas Decorations Continued! How to Make a Muffin Pan Advent Calendar
I make these Advent Calendars for family and friends for Christmas. I purchase the box from Karen Foster's web site, add scrapbook paper, paint, embellishments purchased from Michaels Arts and Craft Store