Children under 6 enter free of charge.
This is a nice museum/nature tour that takes about 2 hours to complete. Located right off of the Overseas Highway, Crane Point is easy to locate and access. The museum portion has a large gift shop, and you can also purchase tickets for the outdoor portion there. The nature trails include two nature centers (Creature Feature and the Butterfly Garden) as well as 2 historic homes - one belonging to George Adderley (which is the oldest surviving house on the Keys), and one belonging to the famous architect, Francis Crane. There is also a nice shoreline boardwalk that dead ends at The Point, a lookout that provides a scenic view of Florida Bay. The nature centers are somewhat "small," but the nature trails are definitely interesting and peaceful - and seeing the Adderley and Crane homes are definitely worth the money spent on the tour.
Small and homey, this is a must-stop, free of the commercialism of a lot of other attractions. Be sure to see the simulated coral reef. Children may dress up as pirates and play on the pirate ship. Nature trails lead to more discovery, including an aviary for bird rehabilitation.