Glue 8 bags together directly on top of each other to form a stack.
Cut the top corners off to form a point.
Cut half circles, and/or triangles along the sides of the stack.
Gently pull the top layer upward and the bottom layer downward, opening the bags until the two ends meet.
Glue the final two sides together. Punch a hole in the top and add a piece of twine or string.