Hey, this is worth seeing, especially if you have kids. Even if you don't.
At the marina they have pet fish. Big ones!!! If you can find this marina, buy a few shrimp (sometimes they'll give you the dead ones) and walk down the dock. The fish (Snook and Sheepshead) are there in the bay waiting to be fed! Just don't put your fingers in the water. This is a short thing, but fun to do.
Take Immokalee Road to Vanderbilt Drive. Take a right at lights on Vanderbilt and the marina is on your left right after the next set of lights.