Fishing, hunting and trapping! Great way to spend time in the outdoors with your son. many kids make extra christmas money trapping muskrats that are tunneling through the dam on a pond, trapping raccoons out of the barn helps out too. Coyote are available just about everywhere and generally pay better for their hides(except eastern) but require more skill to trap. Fox are also more difficult for beginners. These are all available near to or in town, as well as out on the farm. btw some fur buyers still sell marsh rabbit and other carcasses to people who want them.
roaming farmland, woods and marshes is a great introduction to all kinds of hunting, trapping, plant ID, waterfowl ID, natural resource management etc.
Getting rid of the muskrats for a farmer is a good way to get permission to fish in his farm pond too.
get a subscription to Fur Fish and Game magazine, it is full of articles for beginners and advanced trappers and stories for the outdoors person.
https://www.furfishgame.com/
Free courses offered by state wildlife agencies. take the course with your son and you will learn the ropes together. You will make new friends there.
the address for VA. trapper ed is
https://register-ed.com/programs/virginia/65-virginia-trapper-education-course-vta
Local sportsmans clubs can help you also.
Good Luck!