According to Ocola.com
The Labor Department can only regulate employer-employee relationships, so Hancock said the proposed rules shouldn't affect 4-H, Future Farmers of America or other educational programs. And, they may not keep children from helping on their grandparents' or uncle's farms if they aren't paid.
entire article here>>>US Farmers Worry
Don't pay them and you are exempt.
Sorry Large, guess you will have to earn your money doing something else. Like mowing lawns, and not with the brush hog.
A Homesteading Neophyte: New Federal Child Labor Laws Coming to a Farm Near You (edited) (updated)