Is there a good place in Chicago to take a group of 50 teenagers ages 12 to 22 to have fun? -

I am youth leader in my church and i want to take a group of 50 to maybe even 100 youth from chicago to do something fun. I want to do something original with them but i just ran out of ideas... PLEASE HELP... its ok if the place is in a suburb near chicago....

Chicago is home to many museums and 2 zoos. They are open in all seasons. In late Spring or Summer a trip to Great America would be fun:http://egov.cityofchicago.org/city/webpo��http://www.czs.org/czs/Brookfield/Zoo-Ho��http://www.sixflags.com/greatAmerica/ind��

Indoor waterpark, or rent a nearby pool.