People over at AIO Wiki speculated that since this looks very similar to the Kidsboro Book #3: The Creek War cover, RC and VS might stand for "Ryan Cummings" and "Valerie Swanson". Commenters were saying that there may be a repackaging in store for the book series with Gary Locke illustrations, since this picture definitely appears to be by Gary Locke. Here's the cover for The Creek War:
I've read the book, and I know that in that picture, Alice is driving the sled, Ryan is in the second spot, and Jill is in the third. The characters have the same hair color and positions in the new picture, so I think it is highly probable that this scene is what we're looking at. And the "Fingerpainting" part may just mean that this was a finger painting that Gary Locke had done. From the video we've seen before where he drew Eugene, we know that he uses a touchscreen to do all his painting.
I don't know for sure, but this is definitely going somewhere, and I'll be looking for more news to share should any more come up. Thanks for reading! Please comment!