“The skills of building, fixing, cooking, planting, preserving, and composting not only undergird the indepen-dence and integrity of the home but develop practices and skills that are the basic sources of culture and a shared civic life. They teach each generation the demands, gifts, and limits of nature; human participation in and celebration of natural rhythms and patterns; and independence from the culture-destroying ignorance and laziness induced by the ersatz freedom of the modern market.”