I have some mixed feelings about that whole enterprise:  the ethos of American Girl was essentially (relentlessly) upbeat, troubles were made to be fixed, as it were,   Little real sense of the tragic nature of life (which is what you actually want to find in great literature, for children or not).  Its to be commended for being thoroughly wholesome and age-appropriate for girls; that its also so focused on material acquisition is unfortunate, but maybe only to be expected.