Yeah, what Kuki said.
On their first cruise, our kids were 4 and 2.5. We packed a few sand toys and they had a blast at the beach. We took a cab ride to Paradise Beach in Cozumel. [beware of their min. spending if you use their chairs .... we were a bit misled, we didn't want their watertoys as our kids were too young. They invited us to use our chairs, and just to order a few drinks. I had sippy cups with water for our kids, and I don't drink in the AM ... so DH just ordered a few beers .... then they tried to stick with a pp min charge. DH refused and they kicked us out ... which was kind of funny as we were preparing to leave anyways which is why DH went to settle up his tab].