L.F.
Kids Town! It's in Wheaton on Butterfield Rd about 1/2 mile east of Naperville Rd. It's pretty pricey. For a party that you are describing, it would run about $300. But you can bring your own food, all the kids would entertain themselves, and there would be enough room for the adults. (I am assuming that the 30 people = 20 adults + 10 kids.) I had my daughter's 5th b-day party there, and everyone had a great time. I was massively pregnant at the time, so it was well worth it to me to be able to just sit back and relax while the kids entertained themselves, the adults mingled on their own, and the Kids Town staff cleaned everything up. Good luck to you, and happy birthday to your wee one!