mn,a kid doesnt stop growing until they about 18.so lets let him sit on the couch and watch tv until then so he doesnt strain a joint.after 18 tell him he has to go welding outside in 100 degree weather.please let me know what he tells you.
Wrong. A kid's joints don't fuse completely until about 18, they're generally mostly done a 16. Just like with the horses, kids are slowly
asked to take on small amounts of work as they mature, starting at a young age learning to say their ABCs, progressing to Algebra as young teenagers, and being expected to act like an adult once they are an adult. At 18.
As for physical work, I'd rather not even start on that as I have my own complete idea of what should and shouldn't be done by children. Just look at how often kids hurt themselves in football and running and gymnastics and soccer. You can't possibly tell me that it wouldn't be better for them to finish growing before trying anything strenuous like that.