Muse might suggest, for example, that a mom should have a paper-airplane contest with her son one evening to practice emotional development. Let him win a few times, Muse would say, but not every time—he needs to learn how to stay motivated, but also that he can’t always get what he wants. This was a suggestion Muse gave Ming to use with her own son. It also once told her to learn, with her daughter, how a toilet works. They both got so into it that they took the toilet apart and had to learn how to put it back together.