Unfortunately, at this time, I am not able to recommend the program for children. The best thing to do is ask your pediatrician if they would review the supplements and approve them for your child, as the dosages are based on adult needs.
For children (and adults), I always recommend starting with a nutrient-dense diet that is gluten, dairy, and soy free, and includes lots of vegetables, as well as fermented foods. Most of the interventions recommended in the program can be done with children, with the exception of dosing of supplements. Again, I suggest that you work with a functional medicine doctor who is familiar with working with children, as I only work with adults.