A cooperative, immersive, fantasy based game where you try to complete as many quests as you can within a two hour period. Steve took me here years ago, since he had been going since he was a child, and we go most every time we visit the dells. Its always a blast! (Slight warning, with the new location there is a LOT of walking, so if that's not your bag then this may not be for you)
Fun combination of a roller coaster park and water park. Day passes are pretty affordable and its a fun way to spend the day. They do have rooms, though if you want to get rooms that also provide water park access I would really recommend one of the bigger water park resorts like Wilderness or the Kalahari.