According to smartmoney.com the following restaurants offer free kids meals (there are, of course, plenty of restrictions and not every restaurant is participating)
Applebee’s
Savings: About $5 for one kid’s menu meal, including one side dish.
On Monday nights, some Applebee’s locations offer a free meal for one child and $1 meals for any children beyond that.
Rules and restrictions: One child per paying adult. Additional kids’ meals cost $1. Not available everywhere.
IHOP
Savings: About $3-$5 for one kid’s entrée.
Some IHOP locations let kids eat free every day from 4 p.m. to 8 p.m. Individual franchises set up their own promotions, so check with your local IHOP first.
Rules and restrictions: Kids must be 12 and under. Not available at all locations.
The D-Zone at Denny’s
Savings: About $3 (based on the price of an average kid’s meal).
Kids eat free on Tuesday nights at Denny’s from 4 p.m. to 10 p.m. In some locations the deal is offered on Saturday nights as well.
Rules and regulations: Kids must be 10 and under. Two free kids’ meals for every paying adult. Not available at all locations.
Family Fun Night at Chick-fil-A
Value: About $3 (based on the price of one kid’s meal).
At some Chick-fil-A locations, kids can eat free on Tuesdays from 5:30 p.m. to 7:30 p.m.
Rules and restrictions: Free kid’s meal when an adult combo meal is purchased. Not available at all locations.