Count out the Paper Bags. For standard-sized lunch bags, you'll need to use 7-9 bags. The sweet spot for ours has been 8 or 9, so to make sure they can meet at the end without stressing the glue on the other bags. For smaller bags you will use 12-14 bags.
Add Glue to the back of each bag, along the bottom and up the center.
Stack and Repeat. Stack another bag on top of your glue, facing the same directions, pressing it in place. Add glue to the top of this bag, just as you did with the first and repeat until you've use up all the bags you counted out.
Cut as desired. Once you have all your bags glued together, cut the top corners off, forming a point and get creative to make whatever shape you want. You may find a bit of cutting fatigue as you go along, so making 2 stacks of glued bags, cutting them out the same, then gluing them together can help with this.
Glue the last bag. Open the bags up to make sure they meet at the end, if it seems tight, add 1-2 more bags so not to break the glue seams. Hold the ends together for a good minute to make sure the seams will stay.
String up. Punch a hold in the the last 2 bags that you glued together and add string to hang.