That is exactly the premise of this precious book by Sheri Rose Shepherd, titled His Little Princess: Treasured Letters from Your King (His Princess)
I'm no longer in elementary school, but my heart softened at some of the "letters from the King". Oh to think that is how God views me as His daughter! This book would be a great resource when working with young girls (probably like 1st-4th grade), to show them how God wants to know each of them personally and in a real way. Whether your daughter or a little girl in your life reads it every day, I'm not sure if they would or not, but the letters & response prayers I read reminded me as an adult princess of how great my Father's love is for me! So I recommend the book, yet also say check it out first to see if it's something your daughter/girl would like. Everyone is different!