Looking at things from a different perspective, the research on neuroplasticity indicates that the brain really is like a muscle in that it can grow in response to stimuli.
And the video games contain rich environments with many complex cognitive challenges that give brains quite a workout. There is a growing body of research to support that video game play improves cognitive functioning in many areas.
Video or computer games are listed as one of 6 known "brain boosters" in the Feb/Mar 2009 issue of Scientific American Mind. Indeed, Microsoft is looking into the educational benefits of typical video games.You may visit http://gamevaultperth.com.au/ for video game birthday parties for your kids.
On a related note, if I have to choose between my child watching Tom & Jerry or playing Super Mario Galaxy, I encourage him to play a video game because I think is a better workout for his young brain than the passive experience of TV viewing.
Given that I grew up playing computer games, playing video games with my oldest son has been dreams come true in many ways.
But it is also a Pandora's Box. If I left it all up to him, he'd play video games until he passed out from exhaustion. Trying to set limits with him on gaming can sometimes be a challenge.