Hi Diane!
Thank you for visiting the Moms Panel!
I would honestly suggest that both water parks would offer a lot of fun for all your grandsons. Both water parks have rides for all the family, including waterways that you can float around on, using the free inner tubes, and beach areas, and quieter areas, where you can relax on lounge chairs.
The centrepiece of
Blizzard Beach is Summit Plummit, one of the world's tallest free-fall speed slides.
Typhoon Lagoon's main attraction is Surf Pool, a giant wave pool.
My thirteen-year-old son prefers Blizzard Beach, which looks like a snowy ski resort. He loves the speed slides and flumes. I love Typhoon Lagoon as it resembles a tropical paradise.
Enjoy your visit to the water parks!