We made some paper bag stars like these at a Christmas gathering. We used glue sticks, not a glue gun, though. They looked good with brown bags, but I think white bags would be better.
We found that it took at least 8 lunch bags per star, to make it full enough to come around full circle.
I thought a little about making a similar shape with a big accordion-folding of paper at home, but haven't actually tried it out.
This reminds me that I am also planning to make coffee filter watercolored paper flowers again.