1. What is ADHD in children? ADHD is a common childhood neurobehavioral disorder characterized by inattention, hyperactivity, and impulsive behavior. These symptoms can affect children\’s learning, social interaction and daily life, causing great distress to children and families. 2. Symptoms of ADHD in Children There are three main manifestations of ADHD: inattention, hyperactivity and impulsive behavior. Specific manifestations include: inability to maintain attention for long periods of time; easily distracted; lack of planning; difficulty in following rules