Advent calendar. Picked this up at Michael's for $12. The train on top closed the deal, considering the obsession my boys have with all things trains. It's made of balsa wood. I stained it a red mahogany and painted the numbers and a few items on the train silver. Advent calendars were never a part of my childhood, but I wanted to begin the tradition with my boys. This seems simple and sturdy enough to last us a while.