The boys chose three different nine-pointed stars (a symbol often used to represent the Baha'i Faith) for the calendar. So, I started with the cutting out.
I cut two stars for each number on the calendar (i.e. in the end I cut out 38 stars), then sewed each pair together, leaving the top open, so that it forms a little pocket in which to place advent activities and treats. They are filled with quotations, prayers, activities, little treats, etc.
I started by making pretty ribbon loops for each star to attach onto the rope, but then opted for simple curtain clips because it allows me to take down the star for the day and let the boys take out their treat themselves, then easily clip it back onto the rope with the rest of the stars. I used a tiny piece of thread around each hook to secure its position on the rope.