The three-year-old sister of my music students wanted music lessons, too, so I gave her the choice of a sopranino or a G penny-whistle (she was allowed to try the larger recorders and whistles, too, but they were all too big). Finally, I realized that the sopranino would be perfect for the six-year-old, who had been having trouble with her descant (took me long enough). That meant that the eight-year-old needed a sopranino, too, because she's very good about teaching the others. Unfortunately, the six-year-old and the three-year-old seem to have lost interest in music lessons, at least for the present.