Are video-games  video games bad for children?

Nowadays, we see how children play to video-games every day. Parents usually complain about the numbers of hours their children play with video-games at home.
They usually say that exist some video-games are very violent for children and they don't want disagree with their children passing the day with these games. They would prefer to see how their children play in the street instead of inside of home.
From my point of view, playing with video-games may be very useful in our lives and in the lives our children. Fortunately , there are many video-games currently that are used to learn a lot of things, such as maths, foreign languages or even chemistry. In addition, when you are going to buy some video-game, you can choose what kind of video-game you want. This option exists due to the fact that industries have created a classification about for the age of players.
I like playing with my computer every day with video-games about sports, and I also learn to play my guitar because I have a video-game which can learn teach playing an instrument. That´s why, I can say that thanks to video-games, I play football, I learn to play my guitar every day, and sometimes, I can be a super hero.