So I think that I have found a price error on 10 day non expiring tickets with the waterpark option. If you go to Orbitz and find the disney tickets (under activities) you can see all of the options for days and check boxes for hoppers, waterpark and non expiring. If you select non expiring and then you add the waterpark option to it the price stays the same for the 10 day (making the 10 day cheaper than the 9 day non expiring pass). If you then add the hopper option the price increases by the amount of the waterpark and the hopper together so clearly they don't mean to give you the waterpark option for free on the 10 day non expiring pass. You can use a link through ebates to save 10% on activities (which includes disney tickets) so I bought a child 10 day non expiring with waterpark option which would normally be $750 at Disney (tax in) and on Orbitz its only $686 tax in, plus you can save 10% through ebates bringing it down to $618. That is a pretty huge savings and I assume you can also add the hopper after you use it once in order to bridge to gate prices and so then the hopper option would only be around $15 to add after first use if you desired