Playing computer games can have both positive and negative effects on children. Positively, it can improve hand-eye coordination and reaction times. However, children may become overly addicted and ignore other responsibilities like exercise, socializing, and schoolwork, leading to health and academic issues. Violent games can also increase aggressive behavior, as children are rewarded within the games for such actions. Overall, while computer games provide some benefits, their overuse needs to be monitored and balanced with other activities to avoid harmful consequences.