Idea for Advent Calendar
A Kodak blogger had an interesting idea: take a picture of the George Eastman House and use its 24 windows as a traditional advent calendar. That made me reaize that if you had any object with the right number of repeated elements, you could do the same. That could be trees in a forest, cars on a lot, or what have you. If you don't have enough elements in a grid, then you could get a row of several and then set the row out multiple times.