When my sons were that age, they came out to work w/ me (doing construction at the time). They learned a skill and patience. They also got paid after I did. As they grew older, they were able to do more and more. Of course, making more money. They would always tell mom: "I don't know how dad does it...he just keeps going and going...we can't keep up". Now they sure can do more than me!
I didnt have much of being showed how to, but then again yes I did. SO I am not sure where I am personally, but I do try to have the kids do something and make sure they understand you have to do X before you get paid.