Kathy, I can tell you about Coki Beach, we loved it and plan to go again on our next cruise in 2003. We took a taxi there and rented snorkeling equipment, a waist float for my 9 yr. old daugher to use while snorkeling (she is an ok swimmer, but we thought she may get tired out there), lounge chairs and an umbrella. The sand is wonderfully white and soft and the water is beautiful. Blue and clear and very calm. It is like a very large pool! There are a ton of fish for the kids to see in the water, and they even gave us dog biscuits to feed the fish. My kids are a bit older than yours ( 9 & 11), but we saw many children of all ages there. It was wonderful!!