Read the columns titled: Stage and “What child knows…” Find the stage for which your child can consistently do all the things described in that second column. That tells you what your child’s developmental stage is. Then look at the third column for what you can do to help them progress to the next stage.
I hesitated to give any ages for any stage, because the age at which children reach each stage can range a great deal. It depends on gender, the child’s temperament, parent’s temperament, cultural expectations, and other external influences. Focus more on the signs that they are ready, and less on age!