Hi Alime,
Thanks so much for visiting the Disney Parks Moms Panel with your question! I am assuming that you purchased a
Magic Your Way Vacation Package. Let me help to answer a bit about the tickets that come with this package.
You do not need to let anyone know ahead of time which Disney theme park you are going to visit on which day. Since you have six-day tickets, you can choose to visit the Disney theme parks in any order that you wish. For instance, you could spend every day at Magic Kingdom, or you could go to each of the four parks for one day each and then choose to return to two of them on your last two days. You should also check if you added the Park Hopper option. This would allow you to visit more than one theme park each day.
As to the Disney Water Parks, this will depend if you added the Water Park Fun & More option to your tickets. Magic Your Way base tickets include admission to all four Disney theme parks. If you add the Water Park Fun & More option, these also include admission to Disney's Blizzard Beach Water Park and Disney's Typhoon Lagoon Water Park, as well as DisneyQuest and some other Walt Disney World locations.
I suggest that you contact whomever you bought your package through to confirm the type of tickets that you purchased, and whether they include the Park Hopper or Water Park Fun & More option. If you worked with a travel agent, check with them. You can also call Disney directly at 407-W-DISNEY (407-934-7639) and speak with a cast member there to check your reservation.
I hope that this information is helpful for you, Alime! Have a wonderful time planning your vacation, and please do not hesitate to ask if you have any further questions.