TWENTY Penny didn't hesitate. She slipped over the side, landing knee-deep in the warm ocean. She trudged through the shallows to shore. "You have to take one of the tent kits to a platform, and when you're finished, it has to look like that one there!" Luke shouted. Penny's eyes followed the direction of his outstretched arm until she found the tent in question. Huh. She'd expected the tents to be complicated, but they were the same as the heavy-duty four-man safari tents she'd used at every school camp. One person could put them up, even if that person was a ten-year-old who wasn't listening to a word her teacher said. The hardest bit was banging the pegs into the ground if it was rocky, or you couldn't find something suitable to use as a hammer. Penny grabbed a kit and hauled it u