This place is like Vegas for families.
There are two "Strips" and an old downtown (like Fremont St.)
There is certainly a week' worth of activities you can do with your family here.
The best attraction is Noah's Ark.  It's the nation's largest waterpark, with over 40 slides along with extra goodies.

The best hotel (which is also an attraction) is Kalahari.
Named after the African desert, it's theme is apparent and well-utilized.  It holds the nation's largest indoor waterpark along with an outdoor park, live African animals, a separate zoo, a movie theater, arcade, and a conference center.

These are just two things, among several, you should know about this Midwestern resort town.