One of the most common complaints among American parents today is children spending too much time on a computer or other electronic devices. This is especially true if the child spends several hours a day playing video games. Parents may begin to worry that gaming is more than just a waste of time. They fear it might become an addiction. The child could develop a strong desire or need to keep playing. Officials at the World Health Organization are worried, too. They say playing video games creates strong feelings of pleasure and reward in the brain. And in some cases, that can lead to addictive behavior. So, the WHO has listed "gaming disorder" as a mental health condition.