I would like to see something happen with the palm trees (by the beach) and the vines and other bushes around the place. The kids could climb or swing on the vines and/or climb the palm trees (make them coconut) and pick coconuts. Or make some of those flowering bushes (trees?) something magical and have the kids or adults climb them to pick special flowers. Or maybe, build a crude waterslide in the lagoon and have people climb the vines or rocks to get to it and slide into the lagoon.