I wouldn't recommend avoiding computer games entirely, though. As a tool for training mental agility and flexibility, I don't think they can be beat. "Here's an entirely alien environment that operates on a whole different set of rules from anything you've encountered before... go!"
Forever kids have been making up their own imaginary worlds with different rules. They create it from scratch, they live it, they destroy it. Playing has been the world where many of us learned these skills and gained motor skills and sensory awareness all at the same time.
If the kid makes up the rules, then the kid can change the rules. They can't do that in the real world, they have to adapt to the environment they find themselves in, and develop strategies that work within it. Computer games stimulate those cognitive processes.
And then, they can go outside, imagine their own world, and gain sensory awareness and motor skills, because nobody here proposed the child should be sitting in front of World of Warcraft all day.
