I added some details to my bell. The bell is a little brass bell. I use the bell to welcome and farewell when I open and close the altar. I used white and green ribbons along with green embroidery string.
Green ribbon: fertility, plentifuly, life, growth
White: purity, cleanliness, stability
I suppose it's a bit of an Osar theme as far as color alone.
Along the string, I put pearls, glass beads, and small fabric flowers.