Six Flags is your typical amusement park with roller coasters, a few shows, lots of shopping and food. I would reccomend Superman and Batman rides if the lines aren't too long. They have those passes that allow you to skip ahead but they are extra, but in my mind well worth it. Six Flags Great America just openned a new water park called Hurricane Harbor. I would reccomend trying to eat outside the park as this will save you a lot of money. Also, watch for coupons at local restaurants and on pop cans, you can easily save $10.
more