Have the designs need to put it together. This might be a nice option!
I found one! A DIY Advent calendar. I'll add prayers, a Christmas Novena, and have the kids color one a day to count down till Christmas.
Cupcakes with Sprinkles: Advent Calendar http://cupcakeswithsprinkles.blogspot.com/2010/12/advent-calendar.html
I really like this!
Fabric Advent Calendar Tutorial. Great for a lolly free option. Nice to have different shapes for unique bits and bobs.
Felt designs ideas for homemade ornaments. I want to use some of these to decorate my advent calendar.
Conjunto de 24 adornos de calendario de Adviento por felterrific
Ornament Advent Calendar