Shirtless Brad Pitt had Knox in his arms for a fun day at a water park in Malta this afternoon. Angelina Jolie, who was wearing a wet suit, was also on hand for the outing, as were Pax, Shiloh, Zahara, Maddox, and Vivienne. The family checked out the local attraction and apparently got up close and personal with dolphins during their visit. They wrapped up the excitement and headed out of the park as a bunch with both Angelina and Brad sporting wet hair. It was a rare day off for Brad, who was busy filming World War Z over the weekend. He's been showing off the set lately with his adorable kids joining him on location multiple times last week.