They find a couple more pieces of sea glass, and quite a few more tiny shells, before Zivia calls a halt to the search. "All right, we could keep looking for hours, but we gotta get back to construction if we're going to get a good amount done before the tide comes in."

One last thing she snags before they head back: a ribbon of some kind of seaweed, bright green and rippled along one edge, trailing in the sand.