Even when the US considered banning kids from doing dangerous work on farms they still were planning to exempt children on their own family’s farm:
The changes do include a legal exemption for farm families that would allow children to work on the farms owned by their parents. But it would still affect many small farmers who hire kids in the summer or who have extended family members work on their land.
At the 20-acre farm of Julie and Scott Wilber near Boone, Iowa, for example, Drew, 14, and Jade, 12, could still do any work their parents ask of them under the changes. But the Wilbers’ employee, 15-year-old MacKenzie Lewis, would be prohibited from driving the four-wheelers used on many farms, mowing grass or working around animals.
Even when the US considered banning kids from doing dangerous work on farms they still were planning to exempt children on their own family’s farm:
https://www.npr.org/sections/thesalt/2011/11/02/141931995/should-farm-kids-be-allowed-to-drive-a-tractor-some-say-its-too-dangerous