The first is the connection of basic methods. For example, you should practice black and white line drawing, so that the lines will be rich, instead of just drawing a shape and filling in a color; Practice basic modeling, cows are neither cows nor horses, unlike horses. There is no proportion, only characteristics.

Secondly, the steps are very important. Before drawing something, let them think about what it looks like and emphasize its characteristics. After drawing the shape, guide them to what pattern this thing should have, and then guide them to what environment this thing is in. They are full of imagination, that's all. They can give you unexpected works.