A child can make a 3 cube tower at the age of

At 15 monthsMotor: Walks alone; crawls upstairs.Adaptive: Makes the tower of 3 cubes; makes a line with crayon; inses raisin in the bottle.Language; Jargon; follows simple commands; may name a familiar object (e.g. ball).Social: Indicates some desires or needs by pointing; hugs parents.