14-year old Caroline Davenport is indoors playing a video game, but not slumped on the couch. She's rocking to the beat as she competes in her neighborhood dance, dance revolution tournament.   

"I love the music. I love the dancing," said Caroline.   

It's the latest craze in video gaming. Video active games that require kids to get up and get moving. Tournament organizers say they're helping kids stay fit.    

"It's better then them sitting and it's too hot to play outside, it gives them the exercise they need," said Christopher Borawski of Wheaton Library in Wheaton, Maryland.   

Dancing is obviously better exercise than playing a stationary video game on a sofa. But just how much better?  Researchers at the Mayo Clinic in Minnesota are finding that kids playing these types of active video games burn twice, sometimes three times, the amount of calories than kids playing traditional games.    

"When we did allow a few children to play the game at higher settings, they could actually burn maybe five or six times the number of calories they would, playing the traditional hand held games.," said Lorraine Lanningham-Foster from the Mayo Clinic.    

The study used the Sony eye-toy and X-Box's Dance, Dance Revolution.  Researchers are planning further studies on the newest in the video craze - like nintendo's Wii, popular with children and their parents.

As for Caroline, she's lost ten pounds since she started playing in tournaments, and she's having fun, too. A perfect combination, experts say, for successfully fighting childhood obesity.