The problem lies mostly with the boys, but girls, too, are aggressive, prone to bad language and general destructive behavior. Bullying smaller children, fighting among themselves and surliness toward adults is common to both sexes.Yet to all appearances, these children seem normal. Some are deceptively lovable, polite and well-mannered. They smile easily and give the appearance of friendly, gregarious young children of ages from eight to twelve-years-old. Whatever their outward aspect, they are also emotionally distraught, street savvy, proficient liars, thieves and con artists.