Singer, Ph.D., a developmental psychologist and professor at Case Western Reserve University School of Medicine in Cleveland, Ohio. Over the course of the next year, your 3-year-old will develop m ...

Is my child doing what he should be at doing this age? If you are aware of what to expect from your 3-year-old as far as development, milestones and normal behavior go, you’ll both enjoy that ...

And many 3-year-olds are undergoing a major developmental shift. At this age, toddlers may be potty training. “Most 3-year-olds are learning how to potty train, and this new skill or emphasis on ...

emotional capacity and other aspects of brain development. Having 3-year-olds in prekindergarten, for instance, allows the district to identify learning deficiencies or other disabilities early.