Important Milestones: Your Child at Three Years

Milestone Checklist

How your child plays, learns, speaks, and acts offers important clues about your child’s development. Developmental milestones are things most children can do by a certain age.
Check the milestones your child has reached by his or her 3rd birthday. Take this with you and talk with your child’s doctor at every visit about the milestones your child has reached and what to expect next.

What most babies do at this age:

Social and Emotional

Copies adults and friends
Shows affection for friends without prompting
Takes turns in games
Shows concern for crying friend
Understands the idea of “mine” and “his” or “hers”
Shows a wide range of emotions
Separates easily from mom and dad
May get upset with major changes in routine
Dresses and undresses self

Language/Communication

Follows instructions with 2 or 3 steps
Can name most familiar things
Understands words like “in,” “on,” and “under”
Says first name, age, and sex
Names a friend
Says words like “I,” “me,” “we,” and “you” and some plurals (cars, dogs, cats)
Talks well enough for strangers to understand most of the time
Carries on a conversation using 2 to 3 sentences

Cognitive (learning, thinking, problem-solving)

Can work toys with buttons, levers, and moving parts
Plays make-believe with dolls, animals, and people
Does puzzles with 3 or 4 pieces
Understands what “two” means
Copies a circle with pencil or crayon
Turns book pages one at a time
Builds towers of more than 6 blocks
Screws and unscrews jar lids or turns door handle

Movement/Physical Development

Climbs well
Runs easily
Pedals a tricycle (3-wheel bike)
Walks up and down stairs, one foot on each step

Act early by talking to your child’s doctor if your child:

Falls down a lot or has trouble with stairs
Drools or has very unclear speech
Can’t work simple toys (such as peg boards, simple puzzles, turning handle)
Doesn’t speak in sentences
Doesn’t understand simple instructions
Doesn’t play pretend or make-believe
Doesn’t want to play with other children or with toys
Doesn’t make eye contact
Loses skills he once had

If You’re Concerned – Act Early

Tell your child’s doctor or nurse if you notice any of these signs of possible developmental delay for this age, andtalk with someone in your community who is familiar withservices for young children in your area, such as your state’s public early intervention program. For more information, visit our "If You’re Concerned" web page or call 1-800-CDC-INFO.

“Learn the signs. Act early.” materials are not a substitute for standardized, validated developmental screening tools

Adapted from CARING FOR YOUR BABY AND YOUNG CHILD: BIRTH TO AGE 5, Fifth Edition, edited by Steven Shelov and Tanya Remer Altmann © 1991, 1993, 1998, 2004, 2009 by the American Academy of Pediatrics and BRIGHT FUTURES: GUIDELINES FOR HEALTH SUPERVISION OF INFANTS, CHILDREN, AND ADOLESCENTS, Third Edition, edited by Joseph Hagan, Jr., Judith S. Shaw, and Paula M. Duncan, 2008, Elk Grove Village, IL: American Academy of Pediatrics.