My son’s teacher has complained about his hyperactive behavior at school. But at home he sits in front of the computer for hours playing video game.
Parents with children with ADHD are all too familiar with the difficulty of getting their son or daughter to “switch gears.” Similarly, children with ADHD can over-focus on seemingly insignificant details like a bird outside a classroom window. In his book Attention Deficit Disorder, Thomas E. Brown describes this tendency as “hyperfocus” or the inability to disengage one’s attention from a task, sight or sound. That said over-focusing is not among the symptoms listed in the DSM-IV's formal criteria.
Poor organizational skills, inability to focus or priorities, continually losing or misplacing things, forgetfulness, restlessness and edginess, difficulty keeping quiet and speaking out of turn, blurting responses, and poor social timing when talking to others, often interrupting others, mood swings, irritability and a quick temper, inability to deal with stress. http://www.allmothers.net/adhd-in-kids.html