Fallen features beautiful music, and a lot of it is actually positive in spite of the dark sound. The main concern for letting younger kids listen to it is the generally spooky sound of most of the music and two songs - "Tourniquet" is about finding salvation on the verge of suicide and "Haunted" is about being stalked and, possibly, sexually assaulted. As a sexual assault survivor and a Christian who was very depressed at one point in her life, I can say that "Tourniquet" and "Haunted" were both important songs to hear because they gave me someone to relate to (and "Tourniquet", after all is said and done, is about holding on through the darkness), but tweens and little ones probably shouldn't be listening to them just yet.