I discovered less is more. We went last year, and the biggest hits were the wakeboards. I hit up the dollar spot at target before we left though, and we had a basic sandcastle making kit, a couple cheap kites, and scetchbooks. Each day we took a different beach activity in the morning, and then wakeboards always came with us in the evening. My niece and nephew didnt carry the sketchbooks around but my older two have some beautiful beach sketches.
Mom to Kamille (8), Alexis (6) and Rayne (1)