If your child has been diagnosed with predominantly hyperactive impulsive ADHD, this means you, the doctor, and you child's teacher have observed at least six symptoms that fall into the hyperactive-impulsive categories. While your child may exhibit inattention, this symptom is not as evident.
Symptoms of hyperactivity include constant motion, meaning that your child is always moving, even when trying to participate in a quiet activity, such as a board game. It is very difficult for your child to settle down and participate in any type of quiet activity. She runs around from activity to activity or from one object to another, touching everything in sight. It is a major accomplishment for your child to successfully sit still through a meal, in school or when you are reading a story together. You find yourself having to tell your child to stop talking, writes the National Institute of Mental Health (NIMH). 
Your child is not “bad." Instead, it is physically impossible for your child to sit still and restrain the need for activity and movement, states Kids Health. Think about the times your child’s teacher sent notes home, reporting difficulty with behavior or not disrupting other students in class. Your child wants to behave, sit still and stay quiet like classmates, but the ADHD makes it impossible to do so.