Through October 31, 2009 (Halloween), you can get 2 free kid's meals with every $6 adult purchase. More details here. Children must be present in order to get the free kid's meals, makes sense. Must spend $6 for the 2 free kids meals. This could be a really cheap dinner for a family of 6.
It is on their website, but I would recomend giving your store a call to verify that they are participating :)