Attention Deficit Hyperactivity Disorder (Adhd) is One of the Most Common Childhood Brain Disorders and Can Continue Through Adolescence and Adulthood. Symptoms Include Difficulty Staying Focused and Paying Attention, Difficulty Controlling Behaviour, and Hyperactivity (Over-activity). These Symptoms Can Make It Difficult for a Child With Adhd to Succeed in School, Get Along With Other Children or Adults, or Finish Tasks at Home. Inattention, Hyperactivity, and Impulsivity Are the Key Behaviours of Adhd. It is Normal for All Children to Be Inattentive, Hyperactive, or Impulsive Sometimes, but for Children With Adhd, These Behaviours Are More Severe and Occur More Often.