Fold over one end of the wide ribbon about ⅛ of an inch. Then add a few strips of double-sided tape to the back of the wide ribbon.
Wrap the ribbon around the jar, making sure it is straight as it goes around. You can also place the ribbon on a table (tape side up) in a straight line and set the jar on it so the ribbon is in the middle. Then you can just pull and stick the ribbon on the jar.
Make sure that the end of the ribbon that you folded over is the end that overlaps, as it will look much cleaner than having the unfinished end overlap.
Next you will use your thinner ribbon. You will want to cut this ribbon longer than the wide ribbon since you will be tying it. You do not need any adhesive on the back of this ribbon. You can leave the edges on the thinner ribbon as is, or you can cut a little v-shape as I did on mine. Tie the thinner ribbon around the wider ribbon on the jar and make a knot.
Write fun Advent ideas on the Popsicle sticks. A fine-tip permanent marker works best for this task.
When you are done, place the sticks in the jar and pull out one a night during Advent to do with your family. You can also write a number on the back of the sticks so you know which one to pull out each night. This way you can make sure the activities you have planned go with the time you have on any particular day.