Zumba: You've probably at least heard of it. Or maybe you've tried a class.. Zumba is a popular dance-fitness program--- and kids have joined in too. To Rachel Runsick, this Zumba class is a family ...

In a semi-dark room dotted with tiny green laser lights at the Duneland Family YMCA, a group of about a dozen preteen girls gathered to dance to some of today's most popular music (such as Katy ...