I live in Chicago and will turn 40 February of 2011. I want to do something fun and memorable. I've thought of taking a trip or just having some kind of party here. I'm looking for help for some unique ideas. I don't want to just go to dinner.

1. I would want my 2 kids involved - they're 1 and 3 yrs old
2. I don't drink so not really interested in just going to a bar or nightclub (plus then the kids can't come)
3. If I stay in Chicago, I would probably invite my extended family, which mostly consists of 60-70 yr olds

I'm at a loss of what to do. Open to a trip somewhere for a long weekend maybe but it would need to be relatively inexpensive. Open to something in the city like a cool place to eat and then followed by entertainment or something.

Help please!

Here are some sites with various ideas:

Best Way - 40th Birthday Celebration Ideas | eHow.com

40th Birthday Celebration Ideas

40th birthday celebration ideas - 40th Birthday Gifts

40th Birthday Ideas - Information On Ideas For 40th Birthdays

Maybe you could just go to a family restaurant with a little room, so your party can dine alone and talk in it for dinner. Have everyone bring a picture of them when they were 40, good conversation starters, I'm sure lots of laughs. Have them dress from the 70's I think that's right, when you were born. Look up on line the popular things that happened back then.
I'm sure there is more I can think of but I'm up too late already. 5:25 am. Good night for now!