In the Wisconsin Dells you should check out the Blackhawk Motel. It is NOT fancy, but clean, clean clean! Like unbelievably clean. An outdoor pool, indoor pool (both with small slides, and the perfect temp.), little park, and arcade. You park right in front of the door (which is nice for loading and unloading) and there are two little lawn chairs in front of your room. It's like stepping back in time, but it's perfectly maintained and CHEAP! Read the reviews on tripadvisor! I am a hotel snob and have stayed at very nice places but our whole family LOVEs the Blackhawk! We stayed at Kalahari on one visit and I wish we hadn't.
We liked the drive in movie theater, Paul Bunyan cook shanty (for breakfast), the cheese factory for dinner (yummy! not to be confused with Cheesecake factory), Lost Canyon tours, and of course the Ducks! (though that was a bit pricey I thought)
Rick Wilcox magic show is good! And my kids liked Wizard Quest.
Have fun!