Children are likely to improve their concentration skill, logic skill, mathematic as they pay more attention to their game more than in class which also make children learn things more faster or easily.
However, video games also take away a large amount of study time from children as well. More than half of players get addicted and leads to less attention in study, eat not properly, not enough exercise. The biggest risk is that violent video game confuse children mind as children somehow become confusing of what they should do or shouldn't do in the real world.


http://www.buzzle.com/articles/pros-and-cons-of-video-games.html