The likelihood of anyone falling overboard, let alone a child is remote but there other dangers. As you say "we" that should mean that you can keep a look out for both of them just as you will be doing in Florida. I would also think that it would be wiser to keep a keener eye on them in Florida than on the ship. There are areas on most RCI ships which are made specially for children of their age and which they should enjoy so enjoy your holiday. ... Lucy.