The table of contents is here. apologia materials suggest that the lessons are geared for students ages 6-14, quite a large age range, in my opinion, and based on my limited experience, would consider them for mature 8 or 9 year olds or for the older end of the age range.
Who Am I? from the What We Believe series teaches children "what it means to be fearfully and wonderfully made in the image of a loving God." apologia uses a variety of Biblical translations but uses NIV more heavily than other choices. apologia recommends that families use their favorite translation for scripture memory within this study.
The way the study is set up allows parents and teachers to go as fast or as slow as the student needs in order to learn.
Other TOS Crewmates have reviewed "Who Am I? And What Am I Doing Here?" here.
apologia sent me these resources to review for you. I was not paid for this review and am not obligated to provide a positive review.