Does the US have 4H?
Some of my most major personal growth during childhood centred around raising cattle and helping out on the farm. Auctions were a treat, and when it was our 4H club's show and auction, it was doubly so.
I can agree to a certain degree about needing to draw a line... I knew too many young men missing fingers, arms, legs, due to farm accidents... but I don't think prohibiting children from learning a business is any kind of answer. Because why single out farms? Why not prevent Tommy from being allowed to work on cars if his dad's a mechanic? Why not disallow Suzie from baking if that's her mom's trade? I see no reason to single out farming while still allowing kids to do shop class or home-ec or trades based schooling like the welding programs or cosmetology programs that run in some high schools.