The outdoors can be a wonderful learning environment for young children, particularly in our favorable climate in Florida. Much more than gross motor activities, the outdoors can be used for nature/science, dramatic play, art, block play, sand/water play, even reading/storytelling.
The excerpt attached here may give you some ideas to pursue:
http://www.redleafpress.org/assets/clientdocs/social_media/CultivatingOutdoorClassrooms.pdf