I found this on the Mousesavers site:
Visa "Kids Stay and Play FREE" Package
Exclusively for Visa cardholders and available most nights 1/4/04-6/12/04: buy a full-price Walt Disney World Dream Maker Package with your Visa card, and for each adult on the package, one child (3-9) gets a FREE Ultimate Park Hopper pass for the length of stay. 4-night minimum.
This is a good deal IF you will be traveling with two adults and two kids ages 3-9. You will save a larger percentage on your overall vacation by booking the Value or Moderate resorts with this package, since the discount is on the ticket portion of the package. However, you can still save a significant amount at the Deluxe resorts.
Here are two actual examples of savings using this package:
2 adults, 2 children ages 4 & 8, staying at Caribbean Beach resort in early May for 6 nights. With the regular Dream Maker package, they would pay $2218. With this special, they would pay $1657.78. That's a 25% savings!
2 adults, 2 children ages 5 & 7, staying at Polynesian Resort in January for 7 nights. With the regular Dream Maker package, they would pay $3,703.40. With this special, they would pay $3,094.24 -- a savings of 16.5%.