Look at this list
https://knowwhereyourfoodcomesfrom.com/farm-to-table-dining/farm-camps-for-kidsteens/ which has some interesting things in it. It is fine for your son to be interested in more out-of-the box areas. My Houston area son got very interested in Polo and Polocrosse (a horse sport that is a mix of polo and lacrosse) and travelled all over to play these sports. He ended up deciding to become an equine vet and will be starting vet school in the fall. He is in the agriculture department (animal science) at Kansas State and has learned more about farming than he ever had a clue was out there!