Ahoy there, Walter!
Welcome to planDisney! I'm so glad you have the opportunity to enjoy a day in the pixie-dusted paradise of
Disney Castaway Cay. It is one of my favorite ports of call! You are your
little sailor will have a wonderful day.
You will be happy to know that Spring-A-Leak is a freshwater splash and play area featuring misters, splash pads, and, as the name suggests, dripping pipes. This water is "pool-style" according to the Crew Member I spoke with, meaning the water is chlorinated and clean. If you have any questions while you are there, please let a member of the Recreation Crew know.
Right next to Spring-A-Leak is the
Bike Rental hut, so I recommend you take a family bike ride around the island and then cool off in the play area. Then, head over to Cookies BBQ and enjoy a nice lunch, followed by unlimited soft-serve ice cream! Before you know it, it will be time to board the ship, but be sure to dip your feet in the beautiful blue water first. The best thing about Castaway Cay might be that you can enjoy all this fun mere steps away from your home-away-from-home on a gorgeous Disney Cruise Line ship!
I hope this information helps set your mind at ease as you prepare for your vacation, Walter. Please let us know if you have other questions; we are overflowing with advice!
Wishing you many magical memories,
Shannon