Thanks to Close to My Heart, Xyron, and Cricut I was able to complete this adorable advent calendar easily!
Close to My Heart provides the Design Space files (in workshop instructions below). I used my Xyron to make it easier to stick all the little pieces on. The only other thing I did different than the instructions was I used red line tape to adhere each layer of boxes together. I felt it gave it more stability.
Red Line Tape (amazon)