Quick Answer: Developmental milestones are specific skills and behaviors, called developmental milestones, that most children can do by a certain age, tracking their growth in four key areas: social and emotional development, language and communication, cognitive skills (thinking and learning), and physical development (movement).
These milestones are expected within a certain age range, and normal development occurs within these ranges. The CDC’s developmental milestones provide a standard reference for tracking child development and offer a general idea of what to expect as your child grows. It’s important to remember that normal development can follow a slightly different course for each child, and milestones are guidelines rather than strict rules. Development progresses through identifiable stages, each with its own milestones. After listing the four key areas, note that developmental milestones are categorized into five domains: gross motor, fine motor, language, cognitive, and social-emotional. In 2026, these are grouped into four primary areas: Social/Emotional, Language/Communication, Cognitive, and Movement/Physical. These milestones help parents and pediatricians identify if a child is developing typically or if early intervention may be needed.
As a parent, watching your child grow and develop is one of life’s greatest joys. From that first smile to those first wobbly steps, each new skill your child masters is a cause for celebration. But how do you know if your child’s development is on track? That’s where these key skills and behaviors, called developmental milestones, come in. Milestones are expected within a certain age range, and understanding these ranges helps track your child’s progress and identify any potential delays. They provide a general idea of what to expect as your child moves through different stages of development.
At Just 4 Kids Pediatrics, we understand that every child develops at their own pace, often following a slightly different course than expected. Parents often have questions about what’s typical for their child’s age. This comprehensive guide will walk you through the developmental milestones from infancy through early childhood, helping you understand what to expect and when to seek guidance from your pediatrician.
Understanding Developmental Milestones
Development milestones are behaviors and skills that most children can perform by a specific age. Think of them as checkpoints along your child’s developmental journey. As a child grows, they reach new skills and abilities, and these development milestones help track their progress. Monitoring a child’s growth alongside developmental milestones is important for early detection of any concerns. Your child’s doctor plays a key role in monitoring development, conducting physical examinations to assess progress, and interpreting growth charts. The primary care physician is crucial in recognizing developmental delays and guiding families to appropriate interventions. These milestones fall into four main categories:
Social and Emotional Development: How your child interacts with others, shows emotions, and develops relationships
Language and Communication: How your child understands and uses language, including speech, gestures, and later reading and writing
Cognitive Development: How your child thinks, learns, solves problems, and remembers information
Physical Development: How your child uses their body, including both large motor skills (like walking and jumping) and fine motor skills (like grasping objects and writing)
It’s important to understand that the milestone guidelines provided by the Centers for Disease Control and Prevention (CDC) now represent what 75% of children can do by a given age, not just the average. This change, updated in 2022, helps parents and healthcare providers identify potential developmental delays earlier and take action when needed.
Developmental Milestones By Age
2 Months
By two months, your baby is becoming more alert and responsive to the world around them. Here’s what you can typically expect:
Social and Emotional:
- Calms down when spoken to or picked up
- Looks at your face
- Seems happy to see you when you walk up to them
-
Smiles when you talk to or smile at them
Language and Communication:
- Makes sounds other than crying
-
Reacts to loud sounds
Cognitive:
- Watches you as you move
-
Looks at a toy for several seconds
Physical:
- Holds head up when on tummy
- Moves both arms and both legs
- Briefly opens hands
4 Months
At four months, your baby is becoming more interactive and beginning to show their personality:
Social and Emotional:
- Smiles on their own to get your attention
- Chuckles (not yet a full laugh) when you try to make them laugh
-
Looks at you, moves, or makes sounds to get or keep your attention
Language and Communication:
- Makes sounds like “ooo” and “aahh” (cooing)
- Makes sounds back when you talk to them
-
Turns head towards the sound of your voice
Cognitive:
- If hungry, opens mouth when they see breast or bottle
-
Looks at their hands with interest
Physical:
- Holds head steady without support when you are holding them
- Holds a toy when you put it in their hand
- Uses their arm to swing at toys
- Brings hands to mouth
- Pushes up onto elbows/forearms when on tummy
6 Months
At 6 months, babies begin to recognize familiar faces and begin to reach for toys, marking important developmental milestones.
Your six-month-old is becoming more mobile and engaged with their surroundings:
Social and Emotional:
- Knows familiar people
- Likes to look at self in a mirror
-
Laughs
Language and Communication:
- Takes turns making sounds with you
- Blows “raspberries” (sticks tongue out and blows)
-
Makes squealing noises
Cognitive:
- Puts things in their mouth to explore them
- Reaches to grab a toy they want
-
Closes lips to show they don’t want more food
Physical:
- Rolls from tummy to back
- Pushes up with straight arms when on tummy
- Leans on hands to support themselves when sitting
9 Months
At nine months, babies are becoming more curious explorers:
Social and Emotional:
- Is shy, clingy, or fearful around strangers
- Shows several facial expressions, like happy, sad, angry, and surprised
- Looks when you call their name
- Reacts when you leave (looks, reaches for you, or cries)
-
Smiles or laughs when you play peek-a-boo
Language and Communication:
- Makes different sounds like “mamamama” and “babababa”
-
Lifts arms up to be picked up
Cognitive:
- Looks for objects when dropped out of sight (like a spoon or toy)
-
Bangs two things together
Physical:
- Gets to a sitting position by themselves
- Moves things from one hand to their other hand
- Uses fingers to “rake” food towards themselves
- Sits without support
12 Months (1 Year)
At 1 year, many toddlers may take their first step and begin to use words, marking important developmental milestones in both motor skills and communication.
Your one-year-old is transitioning from baby to toddler:
Social and Emotional:
-
Plays games with you, like pat-a-cake
Language and Communication:
- Waves “bye-bye”
- Calls a parent “mama” or “dada” or another special name
-
Understands “no” (pauses briefly or stops when you say it)
Cognitive:
- Puts something in a container, like a block in a cup
-
Looks for things they see you hide, like a toy under a blanket
Physical:
- Pulls up to stand
- Walks, holding on to furniture
- Drinks from a cup without a lid, as you hold it
- Picks things up between thumb and pointer finger, like small bits of food
15 Months
This age brings new independence and communication skills:
Social and Emotional:
- Copies other children while playing, like taking toys out of a container when another child does
- Shows you an object they like
- Claps when excited
- Hugs stuffed doll or other toy
-
Shows you affection (hugs, cuddles, or kisses you)
Language and Communication:
- Tries to say one or two words besides “mama” or “dada,” like “ba” for ball or “da” for dog
- Looks at a familiar object when you name it
- Follows directions given with both a gesture and words (for example, gives you a toy when you hold out your hand and say, “Give me the toy”)
-
Points to ask for something or to get help
Cognitive:
- Tries to use things the right way, like a phone, cup, or book
-
Stacks at least two small objects, like blocks
Physical:
- Takes a few steps on their own
- Uses fingers to feed themselves some food
18 Months
At 18 months, toddlers are becoming little communicators:
Social and Emotional:
- Moves away from you but looks to make sure you are close by
- Points to show you something interesting
- Puts hands out for you to wash them
- Looks at a few pages in a book with you
-
Helps you dress them by pushing arm through sleeve or lifting up foot
Language and Communication:
- Tries to say three or more words besides “mama” or “dada”
-
Follows one-step directions without any gestures, like giving you the toy when you say, “Give it to me”
Cognitive:
- Copies you doing chores, like sweeping with a broom
-
Plays with toys in a simple way, like pushing a toy car
Physical:
- Walks without holding on to anyone or anything
- Scribbles
- Drinks from a cup without a lid, as you hold it
- Feeds themselves with their fingers
- Tries to use a spoon
- Climbs on and off a couch or chair without help
2 Years
At 2 years, toddlers can talk, walk, climb, jump, and run.
Two-year-olds are learning to express themselves and gaining new independence:
Social and Emotional:
- Notices when others are hurt or upset, like pausing or looking sad when someone is crying
-
Looks at your face to see how to react in a new situation
Language and Communication:
- Points to things in a book when you ask, like “Where is the bear?”
- Says at least two words together, like “More milk”
- Points to at least two body parts when you ask them to show you
-
Uses more gestures than just waving and pointing, like blowing a kiss or nodding yes
Cognitive:
- Holds something in one hand while using the other hand (for example, holding a container and taking the lid off)
- Tries to use switches, knobs, or buttons on a toy
-
Plays with more than one toy at the same time, like putting toy food on a toy plate
Physical:
- Kicks a ball
- Runs
- Walks (not climbs) up a few stairs with or without help
- Eats with a spoon
- May be able to throw a ball overhand, which is a key gross motor developmental milestone at this age
30 Months (2.5 Years)
At 30 months, children are refining their skills and becoming more independent:
Social and Emotional:
- Plays next to other children and sometimes plays with them
- Shows you what they can do by saying, “Look at me!”
-
Follows simple routines when told, like helping to pick up toys when you say, “It’s clean-up time”
Language and Communication:
- Says about 50 words
- Says two or more words, with one action word, like “Doggie run”
- Names things in a book when you point and ask, “What is this?”
-
Says words like “I,” “me,” or “we”
Cognitive:
- Uses things to pretend, like feeding a block to a doll as if it were food
- Shows simple problem-solving skills, like standing on a small stool to reach something
- Follows two-step instructions like “Put the toy down and close the door”
-
Shows they know at least one color, like pointing to a red crayon when you ask, “Which one is red?”
Physical:
- Uses hands to twist things, like turning doorknobs or unscrewing lids
- Takes some clothes off by themselves, like loose pants or an open jacket
- Jumps off the ground with both feet
- Turns book pages, one at a time, when you read to them
3 Years
At 3 years, children begin to understand past tense and begin to enjoy playing with others, marking important developmental milestones.
Three-year-olds are becoming more social and developing complex thinking skills:
Social and Emotional:
- Calms down within 10 minutes after you leave them, like at a childcare drop-off
-
Notices other children and joins them to play
Language and Communication:
- Talks with you in conversation using at least two back-and-forth exchanges
- Asks “who,” “what,” “where,” or “why” questions, like “Where is mommy/daddy?”
- Says what action is happening in a picture or book when asked, like “running,” “eating,” or “playing”
- Says first name when asked
-
Talks well enough for others to understand most of the time
Cognitive:
- Draws a circle when you show them how
-
Avoids touching hot objects, like a stove, when you warn them
Physical:
- Strings items together, like large beads or macaroni
- Puts on some clothes by themselves, like loose pants or a jacket
- Uses a fork
4 Years
At 4 years old, children enjoy telling stories and may have imaginary playmates, showing their growing language skills and imagination.
Four-year-olds are developing imagination and social skills:
Social and Emotional:
- Pretends to be something else during play (teacher, superhero, dog)
- Asks to go play with children if none are around, like “Can I play with Alex?”
- Comforts others who are hurt or sad, like hugging a crying friend
- Avoids danger, like not jumping from tall heights at the playground
- Likes to be a “helper”
-
Changes behavior based on where they are (place of worship, library, playground)
Language and Communication:
- Says sentences with four or more words
- Says some words from a song, story, or nursery rhyme
- Talks about at least one thing that happened during their day, like “I played soccer”
-
Answers simple questions like “What is a coat for?” or “What is a crayon for?”
Cognitive:
- Names a few colors of items
- Tells what comes next in a well-known story
-
Draws a person with three or more body parts
Physical:
- Catches a large ball most of the time
- Serves themselves food or pours water, with adult supervision
- Unbuttons some buttons
- Holds crayon or pencil between fingers and thumb (not a fist)
5 Years
Five-year-olds are ready for more structured learning and complex social interactions:
Social and Emotional:
- Follows rules or takes turns when playing games with other children
- Sings, dances, or acts for you
-
Does simple chores at home, like matching socks or clearing the table after eating
Language and Communication:
- Tells a story they heard or made up with at least two events (for example, a cat was stuck in a tree and a firefighter saved it)
- Answers simple questions about a book or story after you read or tell it to them
- Keeps a conversation going with more than three back-and-forth exchanges
-
Uses or recognizes simple rhymes (bat and cat, ball and tall)
Cognitive:
- Counts to 10
- Names some numbers between 1 and 5 when you point to them
- Uses words about time, like “yesterday,” “tomorrow,” “morning,” or “night”
- Pays attention for 5 to 10 minutes during activities (for example, during story time or making arts and crafts, not including screen time)
- Writes some letters in their name
-
Names some letters when you point to them
Physical:
- Buttons some buttons
- Hops on one foot
When To Be Concerned
While every child develops at their own pace, there are times when you should speak with your pediatrician about your child’s development. If a child is not meeting expected developmental milestones, this may indicate a developmental delay. Developmental delays can be specific to one area, such as speech or motor skills, or global, affecting multiple areas of functioning.
Contact your child’s doctor if:
- Your child is not meeting one or more milestones for their age
- Your child has lost skills they once had
- You have any concerns about how your child plays, learns, speaks, acts, or moves
-
Your child’s development seems significantly different from other children their age
Trust your instincts. You know your child best. If something doesn’t feel right, it’s always better to speak up. Early identification and intervention can make a significant difference in your child’s development.
The Importance Of Developmental Screening
The American Academy of Pediatrics recommends that all children receive developmental screening at their 9-month, 18-month, and 30-month well-child visits, along with autism-specific screening at 18 and 24 months. These screenings use validated tools to identify children who may need additional evaluation or early intervention services.
At Just 4 Kids Pediatrics, we incorporate developmental surveillance and screening into every well-child visit. We partner with you to monitor your child’s growth and development, answer your questions, and provide guidance when needed.
How To Support Your Child’s Development
As a parent, you play the most important role in your child’s development. Here are some ways you can support healthy development for kids:
Talk and Read: Talk to your child throughout the day, read books together, and sing songs. These activities build language skills and strengthen your bond. Interact with your child regularly to help them recognize emotional cues and support their social development.
Play Together: Play is how children learn. Get down on the floor and engage in age-appropriate play with your child. Follow their lead and let their imagination guide the activity.
Provide Safe Exploration: Give your child opportunities to explore their environment safely. This helps them develop problem-solving skills and physical abilities.
Establish Routines: Consistent routines help children feel secure and learn what to expect. Regular mealtimes, bedtimes, and daily activities provide structure.
Encourage Independence: Allow your child to do things for themselves as they’re ready. This builds confidence and important life skills.
Limit Screen Time: The American Academy of Pediatrics recommends avoiding digital media (except video chatting) for children younger than 18-24 months, and limiting screen time to one hour per day of high-quality programming for children 2-5 years old.
Stay Current with Well-Child Visits: Regular checkups allow your pediatrician to monitor your child’s growth and development, provide necessary immunizations, and address any concerns early.
Understanding Individual Variation
It’s crucial to remember that developmental milestones are guidelines, not absolute deadlines. Children develop at different rates, and there’s a wide range of what’s considered normal. Some children may master certain skills earlier or later than their peers without any underlying concern. Each child may follow a slightly different course in their development, and this variation is usually normal.
Several factors can influence a child’s developmental timeline:
Prematurity: Children born prematurely may reach milestones based on their adjusted age (calculated from their due date) rather than their birth date, especially in the first two years.
Temperament: Some children are naturally more cautious or more active, which can affect when they attempt new physical skills.
Birth Order: Younger siblings may talk earlier because they hear older siblings talking, or they may walk later because older siblings bring them what they need.
Cultural and Environmental Factors: Different families emphasize different skills, and cultural practices can influence developmental patterns.
Individual Learning Style: Every child has their own way of learning and exploring the world.
Early Intervention Services
If developmental concerns are identified, early intervention services can provide crucial support. These services are designed for infants and toddlers (birth to age 3) who have developmental delays or disabilities. Services may include:
- Speech and language therapy
- Physical therapy
- Occupational therapy
- Developmental therapy
- Family counseling and support
-
Specialized equipment and assistive technology
In Idaho, families can contact the state’s early intervention program, Idaho Infant Toddler Program, to request an evaluation. For children ages 3 and older, services may be available through the local school district.
Red Flags At Any Age
While milestones vary by age, certain warning signs at any age warrant immediate discussion with your pediatrician:
- Not responding to sounds or their name
- Not responding to simple commands
- Loss of previously acquired skills
- Lack of eye contact
- Not showing affection
- Not interested in playing with toys or other children
- Severe and frequent tantrums beyond typical toddler behavior
- Not meeting multiple milestones for their age
- Marked differences in muscle tone (very floppy or very stiff)
- Significant asymmetry in movement or development (using one side of the body much more than the other)
Frequently Asked Questions
What if my child was born prematurely?
If your child was born three or more weeks early, you should use their adjusted age (calculated from their due date rather than birth date) when tracking milestones, especially during the first two years of life. Your pediatrician can help you determine the appropriate timeline for your child’s development.
My child skipped crawling and went straight to walking. Is this a problem?
Not necessarily. While crawling provides benefits for development, some children skip this milestone entirely and develop normally. The updated CDC guidelines no longer include crawling as a required milestone. However, if your child is not mobile in some way by 15 months, discuss this with your pediatrician.
Should I compare my child to other children the same age?
While it’s natural to notice differences between children, try to avoid direct comparisons. Every child develops at their own pace. Focus on your own child’s progress and communicate any concerns to your pediatrician rather than relying on comparisons with other children.
How accurate are developmental milestone checklists?
Developmental milestone checklists are helpful screening tools but are not diagnostic. They represent what 75% of children can do by a given age, meaning 25% of typically developing children may not yet have mastered a particular skill. These checklists track development milestones across various age ranges and can help identify children who may need further assessment. If you have concerns, your pediatrician can conduct more comprehensive developmental screening using validated assessment tools.
What causes developmental delays?
Developmental delay can result from many factors, including genetic conditions, complications during pregnancy or birth, prematurity, environmental factors, lack of stimulation, chronic health conditions, or unknown causes. Sometimes delays occur without any identifiable cause. Early identification and intervention for developmental delay can help children reach their full potential regardless of the cause.
Can too much screen time affect my child’s development?
Yes, excessive screen time, especially in young children, can negatively impact development. It can interfere with sleep, reduce physical activity, limit social interaction, and decrease time spent in creative play. Following the American Academy of Pediatrics’ screen time guidelines helps support healthy development.
Is my child’s speech developing normally if they’re hard to understand?
By age 3, your child should be understood by familiar adults most of the time. By age 4, even strangers should understand most of what your child says. If adults frequently have difficulty understanding your child, or if your child seems frustrated trying to communicate, discuss this with your pediatrician. They may recommend a hearing evaluation or speech therapy evaluation.
My child is very active. Could this be ADHD?
Young children are naturally energetic and have short attention spans. What might look like ADHD in a 2-year-old is often normal developmental behavior. True ADHD is typically not diagnosed until school age (after age 4) when children are expected to sit still and focus for longer periods. However, if your child’s activity level is significantly impacting their safety or ability to participate in age-appropriate activities, discuss this with your pediatrician.
Resources And Next Steps
If you have questions about your child’s development or would like to schedule a well-child visit, please contact Just 4 Kids Pediatrics. We’re here to partner with you in supporting your child’s healthy growth and development.
For additional information about developmental milestones, consider these resources:
CDC’s “Learn the Signs, Act Early” Program: Provides free milestone checklists, videos, and a mobile app for tracking milestones (www.cdc.gov/ActEarly)
American Academy of Pediatrics: Offers comprehensive information about child development and parenting
Idaho Infant Toddler Program: Early intervention services for children birth to age 3
Your Child’s Pediatrician: Always your best resource for questions specific to your child
Making The Most Of Well-Child Visits
Well-child visits are the perfect time to discuss your child’s development. To make the most of these appointments:
- Write down any questions or concerns before your visit
- Bring a list of new skills your child has mastered
- Mention any skills from previous visits that your child hasn’t yet developed
- Be honest about challenges you’re facing at home
- Ask about age-appropriate activities to support development
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Discuss nutrition, sleep, and behavior expectations for your child’s age
At Just 4 Kids Pediatrics, we believe in building strong partnerships with families. We understand that parenting comes with questions and concerns, and we’re here to provide guidance, support, and expert medical care every step of the way. Your child’s health and development are our priority, and we’re honored to be part of your family’s healthcare team.
Remember, childhood development is a journey, not a race. Each child follows their own unique path, reaching milestones in their own time. By staying informed, observing your child closely, maintaining regular healthcare visits, and trusting your instincts, you’re giving your child the best foundation for healthy development.
If you ever have concerns about your child’s development, don’t hesitate to reach out to us. Early identification and support can make all the difference, and we’re here to help every step of the way.