My favorite "Florida" thing to do with visitors is an air boat ride. It's fun, low hassle, and on a warm day you can easily spot plenty of alligators. Krisanne and I drove out to Lake Harney, where we took a 30 minute airboat ride.
One location had half a dozen or more up on the bank, eyeing us.
I tried to get a pic of a flock of birds flying in front of the airboat, but I wasn't fast enough. Instead there is this small sandy area where a few birds are standing.