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New videogame systems like Nintendo's Wii and Sony's Playstation Three are the most sought-after gifts for kids this holiday season. And although some of the games offer educational themes and most offer unprecedented physical play, experts warn that too much gaming still poses health risks for children.

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University of Florida child psychologists say while the new crop of games may offer a physical workout and play with friends, they're still no substitute for outdoor playtime or real-life interaction with peers. Experts say proper socialization and schoolwork can take a backseat when gaming guidelines aren't set early. They say with the purchase of a new system, parents should impose ground rules. These might include requirements that homework be finished before game time, as well as requiring some outdoor exercise or video-free playtime with friends before switching on the games.

Dr. Eric Storch / UF child psychologist

"For many kids it's a very enjoyable aspect of life and we're not saying it's completely bad, and that it shouldn't be taking place, but moderation is the key."

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Experts recommend a maximum of two hours combined tv and videogame time per day for growing kids. Long periods of videogame play per day can lead to isolation from peers and can also increase the risk children will become overweight. A new device that requires a swipe of a programmed key card can be attached to game units and automatically shuts the unit off once kids play to their time limit. But child psychologists say if parents are concerned about videogame play getting out of control, they might reconsider purchasing a system.

Dr. Eric Storch / UF child psychologist

"The notion is to consider the extent to which you can control access to video games and how much they're playing. If that's going to be a problem then don't create a situation in which you can't be in control, or can't limit your kid's access."

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