Using viewfinders and other obervation practice techniques, any teacher can help children learn to draw any object, person, animal, and so on. Children can begin practicing observation drawing beginning in grade one and younger. This is not to say observational drawing needs to replace their drawing from memory and imagination. However, if young children are not helped with observational drawing, many children mistakenly grow up believing they can't draw because they lack talent. It is true that they lack ability, and because no teacher ever helped them develop, they generally end up without talent.
Talent needs nurture in order to flower.
If they do not have observational drawing practice when they are young, most children at about third grade realize the inadequacy of their childlike images. They inevitably see the work of a few peers who have practiced more enlightened and careful observation. For them, even though they can copy precociously, they can find it very threatening to draw from actual objects unless they are given good observational methods. Often, because of their learned dependence on copying, they are totally unaware of methodology by which to develop real observational skill. They too experience a crisis of confidence to the extent that their lack of ability becomes a self-fulfilling inevitability.