Oh nice, thanks! the only thing I’d found that looked similar were Native American stone game balls but that seemed unlikely. All the concrete is gone—I replaced it with pea gravel over landscape cloth and planting beds. Stuff still sometimes comes up when it rains (mostly marbles, glass, ceramics, and plastic clothes pins).

So cool! Do you have any more info on the white balls at the bottom? I found one of those in my yard when I had my concrete removed this summer. They are painted with crisscrossing black stripes.