These mandalas are on very non-traditional brown paper, so to make the cleanup easier when it is time to return the sand to the earth. Usually they put it into a moving body of water, but there was no stream or river near enough to the church. You'll see the ceremony further down.
We also made prayer flags that were strung around the room. The monks would help us with designs and names if we asked, but most people did free-form ones.
The lady in white was one of the organizers of the event. These are mine:
You could buy a string of preprinted prayer flags and many other items, such as bags (of course I did!) and prayer beads. If you bought beads, the head monk would bless them and you:
At the end of the afternoon, we danced (something a local group does, begun in the 1960's, and not a Tibetan Buddism activity, but the monks were very nice about participating) and then the monks conducted a thank-you ceremony and the closing prayers: