I found this at
www.wdwinfo.com
Puerto Vallarta
*Note - These excursions are only a representation of what you can expect for this port of call. These excursions have not been made official.
Pirate Sail & Snorkel Adventure (6.5 hours)
Meeting Time: 8:00am
YO HO! It's the pirate life aboard the Marigalante. You'll be welcomed aboard this "pirate ship" by the congenial captain and crew. You'll be served breakfast, watch the sails be hoisted, and cheer for your favorite contestant in the pirate contest. There's lots of fun in store as you set sail for the two hour voyage to Majahuitas Beach. You'll drop anchor at this secluded spot and have 2 hours to swim, surf and sun. There's a sand sculpturing contest, beach volleyball and other games for you to enjoy. You'll head back onboard the Marigalante for a delicous barbecue lunch. During your two hour cruise back to the port, the captain and crew will put on a pirate show with fun contests for you to take part in.
Price: $62.00 (ages 10 and up), $52.00 (ages 3 - 9)
It looks like it would be lots of fun

Of couse Lea will just have turned 10 by then and she'll be considered an Adult on all disney's excursions