18 Months Walks up/down stairs with help Throws a ball overhand Jumps in place Builds 3-4 blocks tower Turns 2-3 book pages Scribbles Uses cup and spoon 10+ word vocabulary Identifies common objects Has temper tantrums Understands ownership ("mine") Imitates others 3-4 years old Movements milestones Hops and stands on one foot up to five seconds Goes upstairs and downstairs without suppo Kicks ball forward Throws b all overhand Catches bounced ball most of the time Moves forward and backward with agility Milestones in hand and finger skills Copies square shapes Draws a person with two to four body pas Uses scissors Draws circles and squares Begins to copy some capital letters