Before group: Purchase cut flowers, a couple dozen pieces (flowers, greenery) depending on the size of your group. Bring a vase to group that will hold the number of flowers you will be using. Cut your flowers so that they will fit nicely in the vase.
Give each person at least one flower or piece of greenery as they come in. Give more than one if you have enough, especially if your group is small. Ask them to share with the group one thing in their lives that brings beauty to them. After they have shared, have them place their piece in the vase. (Repeat if you choose.) In closing, make a comment about the beautiful things in our live and how if we simply remember to pull those things out of our minds and hearts and gather them together, we have a beautiful bouquet for which to be thankful.