ADD, also known as ADHD (attention deficit hyperactivity disorder), is one of the most frequently occurring childhood psychiatric disorders. Children with the condition often have problems staying focused on a task or sitting still, and often act without thinking. In general, these symptoms first appear in preschool or the early elementary years, and can continue into adolescence and even adulthood. The three types of ADHD are the predominantly inattentive type, the predominantly hyperactive-impulsive type, and the combined type. Warning signs of attention deficit disorder include talking too much, fidgeting with hands and feet, and problems with organization. Children with the disorder rarely outgrow it; however, some may find adaptive ways to accommodate the ADHD as they mature. Currently, there is no cure.