Children, who have problems in attention, are hyperactive as well as impulsive, may be at risk of having ADHD. Some common behaviours of these children include day/dreaming getting easily bored with the task, making careless mistakes, misplacing objects, restlessness, excessive talking and temper tantrums.Such children often act without thinking and blurt out the first thing that comes to their mind without hearing what the other person has to say. They may often interrupt others at the wrong time and seem to have little patience. Such problems often lead to poor grades and academic difficulties.