Even if you're improvising the fact that beforehand you know certain things will work helps you make those improvisations successful. It really helps to have a certain amount of knowledge about musical structure.
Kids are smart. Knowledge is power. Let them figure things out. Don't turn into that grown-up who they won't come to.
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I awake with a not entirely sickened knowledge that I am merely young again and in a funny way at peace an observer who is aware of time's chariot aware that some metamorphosis has occurred.