Nanny's Halloween Rocks. My artist friend, Nanny, paints smooth rocks and pebbles she finds in her yard for the trick-or-treaters that come to her door. She lives in a small town and at first just gave out a couple of dozen. She gave over 100 last time she and I talked about it. The kids are coming from far away now, as they've heard about the rocks. She does one design per year, so she gets pretty fast at painting that owl or spider or witch's hat. She says the children all run to her door early (in case she runs out) to find out what this year's rock will be and they all collect them from year to year. That candy you and I give out - gone within a week and forgotten forever!