And this:-
Important Milestones: By the End of Three Years (36 Months)
Fact Sheet on Milestones
Children develop at their own pace, so it's impossible to tell exactly when yours will learn a given skill. The developmental milestones below will give you a general idea of the changes you can expect as your child gets older, but don't be alarmed if your child takes a slightly different course.
Social and Emotional
Imitates adults and playmates
Spontaneously shows affection for familiar playmates
Can take turns in games
Understands concept of "mine" and "his/hers"
Emotional
Expresses affection openly
Expresses a wide range of emotions
By 3, separates easily from parents
Objects to major changes in routine
Cognitive
Makes mechanical toys work
Matches an object in her hand or room to a picture in a book
Plays make-believe with dolls, animals, and people
Sorts objects by shape and color
Completes puzzles with three or four pieces
Understands concept of "two"
Language
Follows a two- or three-part command
Recognizes and identifies almost all common objects and pictures
Understands most sentences
Understands placement in space ("on," "in," "under")
Uses 4- to 5-word sentences
Can say name, age, and sex
Uses pronouns (I, you, me, we, they) and some plurals (cars, dogs, cats)
Strangers can understand most of her words
Movement
Climbs well
Walks up and down stairs, alternating feet (one foot per stair step)
Kicks ball
Runs easily
Pedals tricycle
Bends over easily without falling
Hand and Finger Skills
Makes up-and-down, side-to-side, and circular lines with pencil or crayon
Turns book pages one at a time
Builds a tower of more than six blocks
Holds a pencil in writing position
Screws and unscrews jar lids, nuts, and bolts
Turns rotating handles