This month's Restaurant Hospitality
focuses almost exclusively on feeding children in restaurants, children's menus and 'winning' establishments that cater to children.
Also, Vicky Lansky has a great (in my opinion) book about infant, toddler, kid food, storage, play food, etc. Feed Me, I'm Yours
can be found << here >>
. I have turned to Lansky's book many, many times and find it a valuable tool for feeding the kids as well as other children's food topics.
Also noteworthy, a local restaurant around here that seems to get a lot of press for their children's menu is called the City Tavern and can found at: http://www.citytavern.com/.
As for chain establishments, Macaronni Grill has a great kids selection as well Border Cafe which features a Big Kids and Little Kids menu.
Personally, with 3 kids (2,4 & 6) I would relish the ability to go to a restaurant that has really, truly taken the time to plan a child's/baby's offerings. And judging by all the people that tend to have been a child at one point or another, it would seem like a worthwhile effort. Good Luck!!