At Holiday Splash, visitors to the indoor water park can go surfing with Santa, float through a giant holiday-themed snow globe in the tidal waves of the Torrent River, enjoy light displays and Christmas music, participate in ornament-making contests, visit with costumed holiday characters and more. Festivities will kick off Saturday and continue select dates through Dec. 30. Holiday Splash festivities are included with water park admission. For details, visit www.schlitterbahn.com/galveston.