From the official WDW website:
Name: Pirate Cruise
Location: Disney's Grand Floridian Resort & Spa
Description: Offers children ages 3-10 a pirate adventure, complete with bandanas, following clues and searching Bay Lake and the Seven Seas Lagoon for buried treasure. Two cast members, including a lifeguard, accompany the group. $24.95 per child, includes PB&J lunch with Gummy Bears, Rice Krispy treats and fruit punch box. Children must be potty trained, no pull-ups. Must cancel 24 hours in advance or pay full price.
Hours: Monday and Thursday 10 a.m. till noon
Information: (407) WDW-DINE (939-3463).