I wouldn't pay AI prices. Although your grand daughter would likely stay for free, I imagine she eats like a bird and would be happy with inexpensive items non AI. Crystal waters would be great. Housekeeper will cook one or two meals a day, you can have leftovers and other favorite snacks in your villa for in between meals out. Cold drinks of choice from your own fridge. Swimming pool and little playground on the beach. Bring along a few beach toys and other pack able favorite activities/toys. Your housekeeper could babysit if you want to go out without the little one here and there. Would be a wonderful, relaxing beach vacation.

Save Disneyland for when she's 7, 8 or 9.