What is best way to see the Everglades say in 8 hrs or less.....for 2 70 yr olds 2 middle of the roaders

and a 3 yr old
P.S. WE DID KSC AND LOVED IT 2 yr old's comment in Saturn V center was "REEAALL Rocket Ship"
Sanibel was great but WOULD NOT stay where we sayed again....