Bob said..
Do any of you know what cool things there are for kids of that age in
Chicago? I am guessing the museums are kid friendly, there will be play
areas in public parks and I know there's Lincoln Park Zoo. I suppose I am
looking for any other activities, child friendly restaurants, child
friendly bars(if there are any!) etc.


Hey, Bob. 
I'm not a Chicago guy but love the city.
The museums are great. You'll need to go to the The Museum of Science and
Industry...GREAT for kids and adults.  Try to got to the "Art Institute" per
it is a terrific museum and I believe they have some kid friendly things.

  The main reason you question caught my eye is to pass on the following to
you (FWIW). 
My daughter and wife just went to Chicago for a "girls week-end away" three
weeks ago. My daughter just turned 10, so she is older then your children
and this may or may not be helpful to you. However, in case this interests
you, they went to the American Girl's shop/theatre...I honestly don't know
what it's called (but I can find out if you desire). Anyway, the dolls are
kind of pricey (actually, my daughter passed on the doll) but it's not the
only reason they might be interested (plus, to me there is something kind of
creepy about getting a doll that "looks just like you" LOL).  They have a
rather up scale restaurant that caters to making it kid friendly, smaller
dishes, cups and the waiters treat them like little adults and the food is
very good (according to my wife). There is also room at the table for the
girl's dolls to be wined and dined too.  Plus, it is really good food and
over looks the historic water tower (I believe).  Yeah, you may want to
check out a local pub if they do this!
   Also, there is an American Girl's Theatre that is currently is doing a
play on girls in history (I can't recall if it's just "American" girls in
history, most likely).   However, my wife expecting it to be overly corny,
was surprised by how well done it was with the focus as much a play on all
sorts of things related to growing up a girl, as it was on these girls in
history.  Plus, if they do this, another chance to check out a pub for you.
;)
  My daughter was also very taken with the street performers. 
I hope you are able to bring the whole family and have a great time!

Best, Steve D.
NP: Dexys Midnight Runnders "Too-Rye-Ay" (My copy just arrived in the mail
and sound very cool. My thanks to the list yet again)