If a child is energetic and has difficulty sitting still, there is likelihood he may be displaying some signs of ADHD however if the child is able to control his/her impulses and emotions, is able to pay attention and respond appropriately in school and at home, then most likely the child has high energy levels and may not fulfill the criteria of ADHD. A child with ADHD is much more involved than simply being active and full of energy.
The core symptoms that define ADHD can include hyperactivity, along with impulsivity and inattention and not all children with ADHD show these symptoms in the same way or same degree. The impairment of functioning or learning is the key to differentiate ADHD from normal activity. Refer to a specialist for further confirmation and management of ADHD.