Hi Stephanie,
The photo CD you've heard about is Disney's Photo Pass, in every park including the water parks you will find Photo Pass photographers that will take your families photo for you, some even add special effects to your photo such as Tinker Bell or Simba. They then give you a special card which is the size of a credit card which you hand to every photographer you use. When you return home you simply type the card number into the Photo Pass website and all your photos will show up, the whole process is very easy. You can then add borders, crop the photos etc before ordering your CD. Last trip I had over 700 photos so for my family it was very good value.
I always pre-purchase my Photo Pass CD by using this link
HERE because it saves me money, the $100 cost covers all the photos that the Photo Pass photographers take of your family at the parks. There is also a full money back guarantee if you decide you no longer want the CD once you return home. There is some great information on the Photo Pass under definitive guides on a site called
www.stitchkingdom.com
A great tip is to make a note of your Photo Pass card number just incase you lose the card. This way you still have the number to type in once you return home and your photos won't be lost!
Have a great trip and stop at lots of photographers,
Jo