If she can do Scratch at school, I would think she could do this. It might be better to do it at home where you can help her, though.
For something completely different, can she teach herself to knit or crochet? Once she can do a basic stockinette stitch, knitting can actually be really good math activity - figuring out designs requires a good intuitive grasp of arithmetic. You can encourage her to learn to alter patterns to fit. And it can be soothing to have something to do with your hands. I knitted through years of classes at MIT.
