Always have and always will. My father made all of the kids learn basic maintenece on our family vehicles (4 + 2 tractors - us boys learned it around age 11 or so) before we were allowed to get our License, and when it came time for oil changes, I loved seeing my sisters pissed off and oil filled hands! The boys had to go I step further and learn how to rebuild an engine, tear down and rebuild the walk behind tiller.
I remeber asking Dad for a go-cart when I was about 12, he said yes and I was soooo excited! He then came home a couple days later from work with a small engines book from the library, a non working 5hp B&S engine, and all the metal I would need. He told me if I was ablt to get the engine running he would get me new wheels and tires and the rest of the parts, and the neighbor down the road wa willing to show me to arc weld if I helped tear off the old roofing on his shop.
Things like this were the norm growing up (teach a man how to fish mentality), it was long summer, it was a beast, but I built me a go cart and learned a hell of a lot of things!