Skills such as taking a first step, smiling for the first time, and waving "bye bye" are called developmental milestones. Children reach milestones in how they play, learn, speak, act, and move.
Click the age of your child below to learn about important milestones
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2 Months
Important Milestones: Your Baby By Two Months
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 2 months 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. 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 babies do by this age:
Social and Emotional
- Begins to smile at people
- Can briefly calm herself (may bring hands to mouth and suck on hand)
- Tries to look at parent
Language/Communication
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Coos, makes gurgling sounds
- Turns head toward sounds
Cognitive (learning, thinking, problem-solving)
- Pays attention to faces
- Begins to follow things with eyes and recognize people at a distance
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Begins to act bored (cries, fussy) if activity doesn’t change
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Movement/Physical Development
- Can hold head up and begins to push up when lying on tummy
- Makes smoother movements with arms and legs
- Doesn’t respond to loud sounds
- Doesn’t watch things as they move
- Doesn’t smile at people
- Doesn’t bring hands to mouth
- Can’t hold head up when pushing up when on tummy
4 Months
Important Milestones: Your Baby By Four Months
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 4 months by completing a checklist with CDC’s free Milestone Tracker mobile app, for iOS
external icon and Androidexternal icon devices, or by printing the checklist. 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 babies do by this age:
Social and Emotional
- Smiles spontaneously, especially at people
- Likes to play with people and might cry when playing stops
- Copies some movements and facial expressions, like smiling or frowning
Language/Communication
- Begins to babble
- Babbles with expression and copies sounds he hears
- Cries in different ways to show hunger, pain, or being tired
Cognitive (learning, thinking, problem-solving)
- Lets you know if he is happy or sad
- Responds to affection
- Reaches for toy with one hand
- Uses hands and eyes together, such as seeing a toy and reaching for it
- Follows moving things with eyes from side to side
- Watches faces closely
- Recognizes familiar people and things at a distance
Movement/Physical Development
- Holds head steady, unsupported
- Pushes down on legs when feet are on a hard surface
- May be able to roll over from tummy to back
- Can hold a toy and shake it and swing at dangling toys
- Brings hands to mouth
- When lying on stomach, pushes up to elbows
Act early by talking to your child’s doctor if your child:
- Doesn’t watch things as they move
- Doesn’t smile at people
- Can’t hold head steady
- Doesn’t coo or make sounds
- Doesn’t bring things to mouth
- Doesn’t push down with legs when feet are placed on a hard surface
- Has trouble moving one or both eyes in all directions
6 Months
Important Milestones: Your Baby By Six Months
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 6 months by completing a checklist with CDC’s free Milestone Tracker mobile app, for iOS and Android devices, or by printing the checklist 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 babies do by this age:
Social and Emotional
- Knows familiar faces and begins to know if someone is a stranger
- Likes to play with others, especially parents
- Responds to other people’s emotions and often seems happy
- Likes to look at self in a mirror
Language/Communication
- Responds to sounds by making sounds
- Strings vowels together when babbling (“ah,” “eh,” “oh”) and likes taking turns with parent while making sounds
- Responds to own name
- Makes sounds to show joy and displeasure
- Begins to say consonant sounds (jabbering with “m,” “b”)
Cognitive (learning, thinking, problem-solving)
- Looks around at things nearby
- Brings things to mouth
- Shows curiosity about things and tries to get things that are out of reach
- Begins to pass things from one hand to the other
Movement/Physical Development
- Rolls over in both directions (front to back, back to front)
- Begins to sit without support
- When standing, supports weight on legs and might bounce
- Rocks back and forth, sometimes crawling backward before moving forward
Act early by talking to your child’s doctor if your child:
- Doesn’t try to get things that are in reach
- Shows no affection for caregivers
- Doesn’t respond to sounds around him
- Has difficulty getting things to mouth
- Doesn’t make vowel sounds (“ah”, “eh”, “oh”)
- Doesn’t roll over in either direction
- Doesn’t laugh or make squealing sounds
- Seems very stiff, with tight muscles
- Seems very floppy, like a rag doll
9 Months
Important Milestones: Your Baby By Nine Months
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 9 months by completing a checklist with CDC’s free Milestone Tracker mobile app, for iOS
external icon and Androidexternal icon devices, or by printing the checklist. 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 babies do by this age:
Social and Emotional
- May be afraid of strangers
- May be clingy with familiar adults
- Has favorite toys
Language/Communication
- Understands “no”
- Makes a lot of different sounds like “mamamama” and “bababababa”
- Copies sounds and gestures of others
- Uses fingers to point at things
Cognitive (learning, thinking, problem-solving)
- Watches the path of something as it falls
- Looks for things she sees you hide
- Plays peek-a-boo
- Puts things in his mouth
- Moves things smoothly from one hand to the other
- Picks up things like cereal o’s between thumb and index finger
Movement/Physical Development
- Stands, holding on
- Can get into sitting position
- Sits without support
- Pulls to stand
- Crawls
Act early by talking to your child’s doctor if your child:
- Doesn’t bear weight on legs with support
- Doesn’t sit with help
- Doesn’t babble (“mama”, “baba”, “dada”)
- Doesn’t play any games involving back-and-forth play
- Doesn’t respond to own name
- Doesn’t seem to recognize familiar people
- Doesn’t look where you point
- Doesn’t transfer toys from one hand to the other
1 Year
Important Milestones: Your Child By One Year
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 1 year by completing a checklist with CDC’s free Milestone Tracker mobile app, for iOS
external icon and Androidexternal icon devices, or by printing the checklist. 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
- Is shy or nervous with strangers
- Cries when mom or dad leaves
- Has favorite things and people
- Shows fear in some situations
- Hands you a book when he wants to hear a story
- Repeats sounds or actions to get attention
- Puts out arm or leg to help with dressing
- Plays games such as “peek-a-boo” and “pat-a-cake”
Language/Communication
- Responds to simple spoken requests
- Uses simple gestures, like shaking head “no” or waving “bye-bye”
- Makes sounds with changes in tone (sounds more like speech)
- Says “mama” and “dada” and exclamations like “uh-oh!”
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Tries to say words you say
Cognitive (learning, thinking, problem-solving)
- Explores things in different ways, like shaking, banging, throwing
- Finds hidden things easily
- Looks at the right picture or thing when it’s named
- Copies gestures
- Starts to use things correctly; for example, drinks from a cup, brushes hair
- Bangs two things together
- Puts things in a container, takes things out of a container
- Lets things go without help
- Pokes with index (pointer) finger
- Follows simple directions like “pick up the toy”
Movement/Physical Development
- Gets to a sitting position without help
- Pulls up to stand, walks holding on to furniture (“cruising”)
- May take a few steps without holding on
- May stand alone
Act early by talking to your child’s doctor if your child:
- Doesn’t crawl
- Can’t stand when supported
- Doesn’t search for things that she sees you hide
- Doesn’t say single words like “mama” or “dada”
- Doesn’t learn gestures like waving or shaking head
- Doesn’t point to things
- Loses skills he once had
18 Months
Important Milestones: Your Child By Eighteen Months
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 18 months by completing a checklist with CDC’s free Milestone Tracker mobile app, for iOS and Android devices, or by printing the checklist . 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 babies do by this age:
Social and Emotional
- Likes to hand things to others as play
- May have temper tantrums
- May be afraid of strangers
- Shows affection to familiar people
- Plays simple pretend, such as feeding a doll
- May cling to caregivers in new situations
- Points to show others something interesting
- Explores alone but with parent close by
Language/Communication
- Says several single words
- Says and shakes head “no”
- Points to show someone what he wants
Cognitive (learning, thinking, problem-solving)
- Knows what ordinary things are for; for example, telephone, brush, spoon
- Points to get the attention of others
- Shows interest in a doll or stuffed animal by pretending to feed
- Points to one body part
- Scribbles on his own
- Can follow 1-step verbal commands without any gestures; for example, sits when you say “sit down”
Movement/Physical Development
- Walks alone
- May walk up steps and run
- Pulls toys while walking
- Can help undress herself
- Drinks from a cup
- Eats with a spoon
Act early by talking to your child’s doctor if your child:
- Doesn’t point to show things to others
- Can’t walk
- Doesn’t know what familiar things are for
- Doesn’t copy others
- Doesn’t gain new words
- Doesn’t have at least 6 words
- Doesn’t notice or mind when a caregiver leaves or returns
- Loses skills he once had
2 Years
Important Milestones: Your Child By Two Years
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 2 years by completing a checklist with CDC’s free Milestone Tracker mobile app, for iOS
external icon and Androidexternal icon devices, or by printing the checklist. 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 others, especially adults and older children
- Gets excited when with other children
- Shows more and more independence
- Shows defiant behavior (doing what he has been told not to)
- Plays mainly beside other children, but is beginning to include other children, such as in chase games
Language/Communication
- Points to things or pictures when they are named
- Knows names of familiar people and body parts
- Says sentences with 2 to 4 words
- Follows simple instructions
- Repeats words overheard in conversation
- Points to things in a book
Cognitive (learning, thinking, problem-solving)
- Finds things even when hidden under two or three covers
- Begins to sort shapes and colors
- Completes sentences and rhymes in familiar books
- Plays simple make-believe games
- Builds towers of 4 or more blocks
- Might use one hand more than the other
- Follows two-step instructions such as “Pick up your shoes and put them in the closet.”
- Names items in a picture book such as a cat, bird, or dog
Movement/Physical Development
- Stands on tiptoe
- Kicks a ball
- Begins to run
- Climbs onto and down from furniture without help
- Walks up and down stairs holding on
- Throws ball overhand
- Makes or copies straight lines and circles
Act early by talking to your child’s doctor if your child:
- Doesn’t use 2-word phrases (for example, “drink milk”)
- Doesn’t know what to do with common things, like a brush, phone, fork, spoon
- Doesn’t copy actions and words
- Doesn’t follow simple instructions
- Doesn’t walk steadily
- Loses skills she once had
3 Years
Important Milestones: Your Child By Three Years
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 iOS
external icon and Androidexternal icon devices, or by printing the checklist . 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
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
video icon - Says words like “I,” “me,” “we,” and “you” and some plurals (cars, dogs, cats)
video icon - Talks well enough for strangers to understand most of the time
video icon - 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
4 Years
Important Milestones: Your Child By Four Years
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 4 years by completing a checklist with CDC’s free Milestone Tracker mobile app, for iOS
external icon and Androidexternal icon devices, or by printing the checklist . 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
- Enjoys doing new things
- Plays “Mom” and “Dad”
- Is more and more creative with make-believe play
- Would rather play with other children than by himself
- Cooperates with other children
- Often can’t tell what’s real and what’s make-believe
- Talks about what she likes and what she is interested in
Language/Communication
- Knows some basic rules of grammar, such as correctly using “he” and “she”
- Sings a song or says a poem from memory such as the “Itsy Bitsy Spider” or the “Wheels on the Bus”
- Tells stories
- Can say first and last name
Cognitive (learning, thinking, problem-solving)
- Names some colors and some numbers
- Understands the idea of counting
- Starts to understand time
- Remembers parts of a story
- Understands the idea of “same” and “different”
- Draws a person with 2 to 4 body parts
- Uses scissors
- Starts to copy some capital letters
- Plays board or card games
- Tells you what he thinks is going to happen next in a book
Movement/Physical Development
- Hops and stands on one foot up to 2 seconds
- Catches a bounced ball most of the time
- Pours, cuts with supervision, and mashes own food
Act early by talking to your child’s doctor if your child:
- Can’t jump in place
- Has trouble scribbling
- Shows no interest in interactive games or make-believe
- Ignores other children or doesn’t respond to people outside the family
- Resists dressing, sleeping, and using the toilet
- Can’t retell a favorite story
- Doesn’t follow 3-part commands
- Doesn’t understand “same” and “different”
- Doesn’t use “me” and “you” correctly
- Speaks unclearly
- Loses skills he once had
Concerned about your child's development?
Complete the EarlySteps referral form and a member of our team will contact you to discuss your concerns.
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