We just celebrated my husband's 40th at Wildfire, but it was only the immediate family. It's a bit on the pricey side but, their food is always good and they have a great kids menu. The advantage is they might possibly be able to place your party in a private room as it seemed like they have smaller rooms for smaller parties. They have coloring menus for the kids and surprisingly, my kids behaved and they're much younger than the 8 and 11 year old(they kept busy eating bread. 6, 5 and 3 y.o.) Another thing, on the kids menu, they had an entree that could be gluton free if there are any allergies. I think it was a steak and potato thing.
Didn't apply to us, just FYI. If you want a more fun atmosphere/decor, Yorktown has Ed Debevic's, which I haven't had the food recently so don't know if it's good in Lombard, not bad in Chicago and/or Champps, who has a large menu selection and great food. Both of the later are more reasonable. Good Luck.