Excitement can become addictive. For example, some researchers are concerned that children’s use of video games, particularly those that involve aggression, may be over stimulating the dopamine drive system. Each time the children score or a make a hit, their brains may be receiving little bursts of dopamine that stimulate their nervous systems. If you over stimulate the nervous system, when you withdraw the stimulant the person becomes easily bored, needing constant excitement to produce energy and they can become agitated and anxious if they don’t get their ‘fix’. Over stimulating the nervous system is dangerous at any age and can lead to addiction but it is especially dangerous when it occurs before the nervous system has fully developed.