It took nearly two years, a ton of restarts, and a lot of frustration, but Miss Kid (my step daughter, 11) finally finished her shawl that she wanted so much. Because of it she's gotten quite good at reading her stitches, picking up dropped stitches, and correcting small mistakes. She's also learned how to knit while walking.
She's incredibly proud of her finished shawl, as she should be. She hasn't decided just yet what she'll work on next, other than it be something small.