We took the Florida trip twice. We started with this trip when the kids were little because we knew we could repeat it after we had seen everything else.
This turned out to be a good decision for us.
The picture here are from the second time around when the kids where 13, 14, 15 and 16.
The first time around, they were 6, 7, 8, 9 and 12. Everybody including the 6 year old were able to handle snorkeling of the boat the first time around.