Important Milestones: By the End of Three Years (36 Months)

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

• 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

 

From CARING FOR YOUR BABY AND YOUNG CHILD: BIRTH TO AGE 5 by Steven Shelov, Robert E. Hannermann, © 1991, 1993, 1998, 2004 by the American Academy of Pediatrics. Used by permission of Bantam Books, a division of Random House, Inc.