Developmental Milestones — Birth Through Age 5
These milestones describe what most children can do at each age. They are guideposts, not deadlines — every child develops at their own pace. Children who are born premature should be evaluated against their adjusted age (chronological age minus weeks early) until about age 2. The categories below — motor, language, social-emotional, and cognitive — reflect the four domains tracked by the American Academy of Pediatrics and the CDC's "Learn the Signs. Act Early." program. Talk to your pediatrician at well visits if your child is consistently missing milestones in any one category.
Milestones at 2 months
🏃 Motor Skills
- Holds head up when on tummy
- Makes smoother arm and leg movements
🗣️ Language & Communication
- Coos, makes gurgling sounds
- Turns head toward sounds
🤝 Social & Emotional
- Begins to smile at people
- Briefly calms self (may bring hands to mouth)
🧠 Cognitive
- Pays attention to faces
- Begins to follow things with eyes
Based on CDC/AAP developmental milestone guidelines. Every child develops at their own pace — discuss any concerns with your pediatrician.
Milestones at 4 months
🏃 Motor Skills
- Holds head steady without support
- Pushes down on legs when feet are on a hard surface
- May roll from tummy to back
🗣️ Language & Communication
- Begins to babble
- Copies sounds he hears
- Cries in different ways for different needs
🤝 Social & Emotional
- Smiles spontaneously
- Likes to play with people
- Copies facial movements
🧠 Cognitive
- Reaches for toy with one hand
- Uses hands and eyes together
- Follows moving things with eyes
Based on CDC/AAP developmental milestone guidelines. Every child develops at their own pace — discuss any concerns with your pediatrician.
Milestones at 6 months
🏃 Motor Skills
- Rolls over in both directions
- Begins to sit without support
- Supports weight on legs and might bounce
🗣️ Language & Communication
- Responds to own name
- Strings vowels together ("ah", "eh", "oh")
- Responds to sounds by making sounds
🤝 Social & Emotional
- Knows familiar faces
- Likes to play with others
- Responds to other people's emotions
🧠 Cognitive
- Brings things to mouth
- Shows curiosity about things
- Tries to get things that are out of reach
Based on CDC/AAP developmental milestone guidelines. Every child develops at their own pace — discuss any concerns with your pediatrician.
Milestones at 9 months
🏃 Motor Skills
- Stands holding on
- Can get into sitting position
- Crawls
🗣️ Language & Communication
- Understands "no"
- Makes many different sounds
- Copies sounds and gestures
🤝 Social & Emotional
- May be afraid of strangers
- Has favorite toys
- May be clingy with familiar adults
🧠 Cognitive
- Watches the path of something as it falls
- Looks for things you hide
- Plays peek-a-boo
Based on CDC/AAP developmental milestone guidelines. Every child develops at their own pace — discuss any concerns with your pediatrician.
Milestones at 12 months
🏃 Motor Skills
- Gets to a sitting position without help
- Pulls up to stand, walks holding on to furniture
- May take a few steps without holding on
🗣️ Language & Communication
- Responds to simple spoken requests
- Uses simple gestures (shaking head, waving)
- Says "mama" and "dada" and exclamations like "uh-oh!"
🤝 Social & Emotional
- Is shy or nervous with strangers
- Cries when mom or dad leaves
- Has favorite things and people
🧠 Cognitive
- Explores things in different ways (shaking, banging, throwing)
- Finds hidden things easily
- Copies gestures
Based on CDC/AAP developmental milestone guidelines. Every child develops at their own pace — discuss any concerns with your pediatrician.
Milestones at 18 months
🏃 Motor Skills
- Walks alone
- May walk up steps and run
- Pulls toys while walking
- Helps undress self
🗣️ Language & Communication
- Says several single words
- Says and shakes head "no"
- Points to show what he wants
🤝 Social & Emotional
- May have temper tantrums
- May be afraid of strangers
- Shows affection to familiar people
- Plays simple pretend (feeding a doll)
🧠 Cognitive
- Knows what ordinary things are for (phone, brush, spoon)
- Points to get the attention of others
- Shows interest in a doll or stuffed animal by pretending to feed
Based on CDC/AAP developmental milestone guidelines. Every child develops at their own pace — discuss any concerns with your pediatrician.
Milestones at 2 years
🏃 Motor Skills
- Kicks a ball
- Begins to run
- Walks up and down stairs holding on
- Throws ball overhand
🗣️ Language & Communication
- Points to things in a book
- Says sentences with 2 to 4 words
- Follows simple instructions
- Knows names of familiar people and body parts
🤝 Social & Emotional
- Copies others, especially adults and older children
- Gets excited when with other children
- Shows increasing independence
- Shows defiant behavior
🧠 Cognitive
- Finds things hidden under 2-3 covers
- Begins to sort shapes and colors
- Completes sentences and rhymes in familiar books
- Plays simple make-believe games
Based on CDC/AAP developmental milestone guidelines. Every child develops at their own pace — discuss any concerns with your pediatrician.
Milestones at 3 years
🏃 Motor Skills
- Climbs well
- Runs easily
- Pedals a tricycle
- Walks up and down stairs with one foot on each step
🗣️ Language & Communication
- Follows 2- or 3-step instructions
- Can name most familiar things
- Says first name, age, and sex
- Carries on a conversation using 2-3 sentences
🤝 Social & Emotional
- Copies adults and friends
- Takes turns in games
- Shows concern for crying friend
- Understands "mine", "his", "hers"
🧠 Cognitive
- Can work toys with buttons, levers, and moving parts
- Plays make-believe with dolls, animals, and people
- Does puzzles with 3 or 4 pieces
- Turns book pages one at a time
Based on CDC/AAP developmental milestone guidelines. Every child develops at their own pace — discuss any concerns with your pediatrician.
Milestones at 4 years
🏃 Motor Skills
- 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
🗣️ Language & Communication
- Knows some basic grammar rules
- Sings a song or says a poem from memory
- Tells stories
- Can say first and last name
🤝 Social & 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 alone
🧠 Cognitive
- Names some colors and numbers
- Understands counting
- Starts to understand time
- Draws a person with 2 to 4 body parts
Based on CDC/AAP developmental milestone guidelines. Every child develops at their own pace — discuss any concerns with your pediatrician.
Milestones at 5 years
🏃 Motor Skills
- Stands on one foot for 10 seconds or longer
- Hops and may skip
- Can do a somersault
- Uses a fork and spoon, sometimes a knife
🗣️ Language & Communication
- Speaks very clearly
- Tells a simple story using full sentences
- Uses future tense ("Grandma will be here")
- Says name and address
🤝 Social & Emotional
- Wants to please friends
- Wants to be like friends
- More likely to agree with rules
- Likes to sing, dance, and act
🧠 Cognitive
- Can count 10 or more things
- Draws a person with at least 6 body parts
- Can print some letters or numbers
- Knows about things used every day (money, food)
Based on CDC/AAP developmental milestone guidelines. Every child develops at their own pace — discuss any concerns with your pediatrician.
Sources & references
These references informed the guidance on this page. They are provided for transparency and further reading; they are not endorsements, and this page is not a substitute for the advice of your child's own clinician.