There any baseball? Minimum gambling age in Fl is 18 I believe.
We rented a hobie at Sanibel. That was worth it. Looking at shells and old people (well, now I are one) only went so far. Depends upon the storm situation. Definitely rather be on the water.
I was more on the East Coast but I'd imagine you could do the same over that side. Non-Floridians forget how wild Fl really is. Personally, I'd rather leave the beach and head to the swamps or Okeechobee or Immokelee. Ton of history in the area. Of course fishing. Go meet some rednecks. See how the Indians lived. Hit a casino. Get a non-touristy airboat ride. Even better at night if you can find someone to take you. Then you'll see some real wildlife. If you can find a short scuba course and trip, that's a cool family thing.
But beaches and bars aren't bad either.