Child Facial Scar - What Laser Helps Reduce Appearance?

My daughter has two facial scars from accidents. She is only 10 years old, but being a girl, with her self-conscious years ahead, I thought she should have some laser treatments to help the appearance of the scars. The scars are not raised, but have a shiny surface and are somewhat lighter than the surrounding skin. They are also mildly indented. She has already had 3 Fraxel treatments, 1 Active Fx and 1 Deep Fx. The last one being about 5 months ago. I have seen about a 15% improvement thus far. Her dermatologist wants to do two more Deep FX treatments, 6 weeks apart. I am not sure if we should continue considering the minimal improvement seen so far. Does anyone have any advice? Thank you.