VERY GOOD! There are not many adult designers who can draw as interesting things as that, and she must really have a lot of patience. She has really put a lot of work in the details.
Nicely done! She has a feel for elegant line work.
Have her try a script brush and India ink. The elegance she can achieve will propel her drawings to the next level if she can master the tool. I used to ink my drawings with a Kooh-I-Noor drafting pen but once I mastered a script bush I never went back. The ability to create thin and thick line by adjusting the amount of pressure is awesome. Also, I always felt it was easier to draw long arcs with the brush.
Drawing on paper with pen/pencil is the best way to start out in my opinion. This as a very interesting drawing, i love to look at this kind of thing, i always wonder what the child was thinking or dreaming as they invented the situation in front of them, i remember doing very similar things as a child - hell i still doodle now.
Pity it's not all available on screen, great work though.