Children with Attention Deficit Disorder (with or without hyperactivity) have been helped through homeopathic treatment. The best book on the subject is Ritalin Free Kids by J. Reichenberg-Ullman and R.Ullman.
Homeopathy has has won accolades in a host of other behavioral problems including extremely angry, violent children; dopey, spacy, inattentive kids; chronic liars; children with many debilitating fears (of the dark, ghosts, robbers, being left alone, etc.); and children with terrible nightmares. I have seen case after case in both children and adults where negative mental states have melted away after the correct homeopathic medicine was given.