My first time experience was an enjoyable lunch presentation about drone mapping of the 110,000 acre estuary and the geographical changes of southwest Florida since 1940. The minimal fee included entry to the educational learning center (touch tanks great for children 3+), butterfly garden (blue italia native to SWFL only - pic attanched), and snail walk. The speaker and volunteers were informative and passionate about their mission in caring for this protected area. There are kayak and eco tours which allow you to immerse yourselves in nature even more.