Hello, Loredana!
Wow! 11 days in Walt Disney World! What a great vacation!
Having the Park Hopper Option on your Magic Your Way Base Tickets is a great idea; this will give you the flexibility to head back to your resort after a great day in the park, then head to a different park for dinner and evening entertainment.
The Park Hopper, however, does not include entrance to Disney's two water parks. Take a look at
Walt Disney World's online ticketing window, which will detail the cost and entitlements included in the Water Park Fun & More Option. These entitlements will include 11 days' worth of entrance to either of the two water parks. According to
an answer to a Frequently Asked Question, park hopping does not pertain to the water parks. In other words, if you visit Disney's Blizzard Beach Water Park in the morning, and head over to Disney's Typhoon Lagoon Water Park later that same day, this will use two entitlements.
I hope this answers your questions! Please send more as you think of them! We love to help!