My son has been different from my other children, all his life. Even as a baby, I would notice that he was difficult to calm, impulsive, hyperactive and very angry. I discussed these matters with the pediatrician, very early in his toddler years. He assured me that it was probably just normal boy characteristics. Being that my oldest was a girl and my youngest was an infant, I had no idea what to expect from a toddler boy. So I dismissed my worries and figured that things would change. They did not.