A friend pointed me towards this website, if you sign up for free, your kids get to bowl (2 games a day) for free all summer long!
I looked at some of the areas available and there are many. South Florida unfortunately is a bit lacking and the nearest one is in West Palm Beach.
There is a page on the website that can suggest a bowling center near you and they say they will attempt to get them to participate and then let you know when they succeed.
Here is the link to the participating alleys.
Nationwide: http://www.kidsbowlfree.com/