Pushing a 4-year-old toward "correct" representational drawing, or expecting a 3-year-old to stay within lines, typically creates frustration and can discourage genuine creative confidence — developmentally appropriate expectations matter as much in art as in any other skill area.
Younger children are naturally process-focused (enjoying the act of creating, regardless of result), while older children increasingly care about outcome and technical quality — supporting this natural shift, rather than either rushing it or dismissing a child's growing interest in genuine skill development, matters for keeping creative engagement positive through this transition.