It goes without saying that most parents want what is best for their children. De®nitions of best may vary from parent to parent, even from generation to generation, but by and large we parents do what we can to mobilize our resources to prepare our children for long and happy lives. Usually this means that we strive for the most relevant, most important, and most useful experiences within our reach, and to allocate as many of our disposable resources as we can toward achieving this end. Of course, resources are limited, and so we are incentivized to look for bargains that will provide our children with desirable experiences at little or no cost.