Sorry again for the long break; I was sick, and then I was at a conference in Florida, and then I was on vacation in Michigan’s UP, and now I’m back.
My son was emphatic that this was the sketch of the week, because he liked the composition and the implied narrative and the fact that there was dialogue:

I’m not so sure. From a technical standpoint, I think this sketch of a single stone on a Lake Superior beach just outside Porcupine Mountain Wilderness Area is the better sketch:

I have the grit on the sand all wrong (I got sloppy, and the technique was no good to begin with) but I feel like I got the depth of the shadow right for maybe the first time ever.
Anyway, it’s not really my call which is “best”; that’s for you. I get what I get out of them in the drawing, and in sharing them with my son.