If beer or partying is your thing, then these cards might work for you. The Wisconsin Dells VIP Pub Crawl Card costs $10 and gets you one free beer with the purchase of another at 30 Dells area bars & restaurants.  There is a limit
of one free beer per card per establishment and the total value advertised
is "over $100".  A similar card for 2-for-1 mixed drinks is called the
Cocktail Shakers Card.  It advertises "over $150 value" for $10.

There are 2 free kids discount cards that we are aware of.  Both cards
offer one free 12 and under admission with one paid adult at participating
merchants. One of them is distributed by Culver's in May and is called the "Culver's Kids Card".  Also, the "Wisconsin Dells Kids Card" is distributed
by the Wisconsin Dells Visitor & Convention Bureau at major league
soccer games, minor league baseball games and elementary school reading programs. Visit their Website or call 1-800-223-3557 for more info.

This is another discount card that is distributed by the Wisconsin Dells
Visitor & Convention Bureau.  The drawback to these cards is that
the discounts are only valid until June 23rd and they are only given
away on radio stations. So you need to live close enough to a
participating radio station, have a little luck, and visit the
Wisconsin Dells by June 23 to benefit from these cards.

These are sold for just $10, but there are no discounts for Noah's Ark,
Mt Olympus, Riverview Park or Tommy Bartlett and only 40 businesses in all.
The Fun Card might make sense for some in addition to the Wisconsin Dells Coupon Book.  But if it's one or the other, the WDCB is a "no brainer". 
For more information about the Dells Fun Card visit DellsFunCard.com.