anti-impulsiveness training?

Like many moms I know, I'm distressed about my kids' irresistible attraction to computer games that as far as I can tell quite efficiently train the brain to be impulsive -- by shooting guns, firing missiles, etc. And I've been frustrated by the usual busy/guilty mom's dilemma: is it okay to cave and let them play for an hour (or, sigh, two) if it means I get to read the New York Times? So I've finally hit on an alternative idea, and I promise to file a report later on to let you know if it works. I just shelled out nearly $300 for a neuro-feedback program called Freeze-Framer. It measures the regularity of your heartbeat as you concentrate on getting a hot-air balloon to go over a field and not get knocked down by various low-lying obstacles. I tried my brother's version when he visited from Massachusetts and loved it. I'm planning to give the program as a Hanukah gift to my 11-year-old with a lot of hooplah about how it's a contest of mastering your mind. Time will tell if it's a good investment, but I'm optimistic....