Hi Anna and thank you for visiting the Disney Parks Moms Panel again!
Your vacation is going to be here before you know it! The ticket policy at Walt Disney World theme parks and water parks is one ticket per person so you will not be able to use your ticket for admission for 3 people. If the 4-day Magic Your Way ticket is a Park Hopper Plus, you can use it for admission for one person to one of Walt Disney World's fabulous water parks.
If the ticket is not a Park Hopper Plus and you still want to visit
Disney's Typhoon Lagoon Water Park or
Disney's Blizzard Beach Water Park, you could upgrade the Park Hoppers you receive with your package. I believe upgrading would be cheaper than buying separate water park tickets. With a 4-day Park Hopper Plus ticket, you would be able to visit a water park four times plus have access to other fun activities with your family.
Personally, my favorite is Disney's Typhoon Lagoon Water Park. I could spend all day drifting in the 2,000-foot-long
Castaway Creek.
Whichever option you choose, I hope you have a magical vacation,
Amy H