I chose to forgo the metal ring and tied a loop out of the thick string. I also just tied the end into a knot as apposed to the extra string tying/cutting. I did not add pom poms.
I bought an inexpensive vase from the dollar store as well as some rocks. I then went to a florist and purchased an air plant (ie: tillandsia), which only needs to be dunked in water or given a good spray every 2 weeks. No soil required!
Enjoy! And Happy Holidays!