A little encouragement to listen to sounds (""like the pur-r-ing pussycat. . . or insects in the grass""), as Max does; a little encouragement not to make loud sounds, as Max does before he discovers ""that pot lids make a ringing, singing sound when tapped together very lightly."" A trip to a concert, and some follow-up instrument-making; some singing at play, some sleepy humming to his Snoopy. And then, big hand in little, ""Good night, Dad. Good night, Max."" Music-readiness training, in sum, or another course in doing consciously what comes to most kids pretty naturally. The photos, however, don't look posed and Max (who appears to be of part-Oriental ancestry) is an exceptionally engaging child--with the result that fidgety kids might sit through this for the pleasure of seeing what he's up to.