ADHD problems often become worse in settings where there is more activity and noise. Children with ADHD cannot control at least some of their hyperactive, impulsive behavior. Children who misbehave on purpose often will look over their shoulders to see how adults react to their misbehavior. You can tell by the look on your child's face. It's normal for parents to get irritated and even to get angry with their children from time to time.
Most parents can sense when their children misbehave on purpose.
This is frustrating. They go from one activity to another, and another and another. My child can watch cartoons on television for a long time. Children with ADHD are often able to keep their attention on the fast-paced world of cartoons and video games. Often, such children will keep their eyes on the screen, but will be constantly fidgeting their legs and arms.