Here's my take on it from the other side of the fence:
If I were 12, or even as just a 'first-time-quilter' I would be more proud of "my" quilt than concerned about technicalities. Let them be happy with their successes. Should they come back and want to continue quilting, they will learn more than just the basics, and their techniques will improve. They'll be able to have the comparison later on, and be able to see their own growth with each project.
Personally, I'd let it go.
ETA: I didn't realize that Cas said pretty much the same thing a bit ago...as perhaps did others on this thread.