From the book Seven Times the Sun, p. 45:
A simple participatory prayer is the circle prayer…someone might begin: ‘Spirit of Life, bless the activities of our day.’ The prayer travels around the table as each person names a special event, work to be accomplished, time with a friend, etc. For a Thanksgiving meal, someone might begin: ‘Creator, we offer thanks for the blessings of our lives.’ The prayer comes full circle as each person names a blessing from the year past for which they wish to offer thanks.