Examine the physical changes associated with infancy and toddlerhood (0-3 Years) developmental stage.•

Examine the physical changes associated with infancy and toddlerhood (0-3 Years) developmental stage.•Examine the cognitive changes associated with infancy and toddlerhood (0-3 Years) developmental stage.•Examine the emotional changes associated with infancy and toddlerhood (0-3 Years) developmental stage.•Examine the social changes associated with infancy and toddlerhood (0-3 Years) developmental stage.•Evaluate the developmental changes and appraise the effects of the physical, cognitive, emotional, and social environments with infancy and toddlerhood (0-3 Years) developmental stage.•Integrate developmental and environmental factors into an assessment of developmental needs of infancy and toddlerhood (0-3 Years).•