Full warning: I know NOTHING about this program, however, in tourist areas be very careful giving someone money, in advance which is non-refundable. However, a simple Google search yielded some info. Here is a link to a previous TA comment regarding the program.
Here's a copy/paste of it.
I've learned not to buy tickets in advance as I wasted some $$ before because plans changed. Passport to Savings booths are located throughout the Dells area and you can always get your tickets when you get there and then can ask additional questions.
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May 13, 2010, 8:40 AM
Thank you for the information. I have been reading up more and have got to know that there are many options of passes to buy to save. Does anyone know which would be the best one. We are a family of 4 adults, and one child under 2. So, I guess she will be free in any case in all attractions. The attractions we plan on visiting are Noah's Ark, Tommy Bartlett Show, Wiconsin Ducks Tour, Boat Tour. Also, the Deer Park and the Lost Canyon Tours, although I dont think any passes cover those.