Important Milestones: Your Child By Three Years
Milestone Tracker App
How your child plays, learns, speaks, acts, and moves 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 the end of 3 years by completing a checklist with CDC’s free Milestone Tracker mobile app, for iOSexternal icon and Androidexternal icon devices, or by printing the checklist pdf icon[321 KB, 2 Pages, Print Only] below. Take the checklist 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 children do by 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
- 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
- Climbs well
- Runs easily
- Pedals a tricycle (3-wheel bike)
- Walks up and down stairs, one foot on each step
- 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
Tell your child’s doctor or nurse if you notice any of these signs of possible developmental delay for this age and ask for a developmental screening. Talk with someone in your community who is familiar with services for young children in your area. For more information, visit our “If You’re Concerned” web page or call 1-800-CDC-INFO.
The American Academy of Pediatrics recommends that children be screened for general development using standardized, validated tools at 9, 18, and 30 months and for autism at 18 and 24 months or whenever a parent or provider has a concern. Ask your child’s doctor about your child’s developmental screening.
“Learn the Signs. Act Early.” materials are not a substitute for standardized, validated developmental screening tools pdf icon[918 KB, 115 Pages, Print Only]external icon.
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.