What do you think of the way Waldorf schools suggest which instrument should a child play? Based on their temperament, your main teacher assigns you an instrument after watching the way you think, feel, and behave for at least two years (if you start school in first grade). Once you get to third grade, the teacher has a great sense of your personality and can assign an instrument that will fit your needs and help you develop even further.

Anyway, it's another approach that goes beyond simply putting an instrument in your hands without any deeper understanding of the child.