How Babies Learn and Develop:

4-8 Months

Babies 4-8 months old may explore objects with their mouth and by kicking, reaching, grasping, pulling, and letting go. They delight in discovering new skills!

Babies at this age can smile, laugh, coo, and reach out to engage their parents and other caregivers. They love to listen and respond to language by imitating the sounds and rhythms of what they hear.

Every child learns and grows at his or her own pace. This page describes typical development but all children are different. If you have questions or concerns about your child’s development, talk to your child’s health care provider. 

Loving relationships are the building blocks for healthy development.

Loving relationships make children feel safe, valued and encouraged. Relationships teach young children how to form friendships, understand and communicate their feelings, and overcome challenges.

Through our relationships with them as they grow, we teach children to develop compassion for others and a sense of right and wrong.

Starting at birth, the way that adults treat babies shapes what they learn and understand about themselves.

Every day when we care for and interact with our children we send them messages such as: You’re smart, you figured that out! You make me laugh and I enjoy being with you. You are loved. 

These messages shape how a baby feels about herself ( self-esteem).

Tips to support social-emotional development at 4-8 months:

  • Provide warm, responsive care. Give your baby the care that matches his needs. Once you get to know your baby, you will know what he likes and dislikes and what daily schedule works for him. Make sure to share this information with all of your baby’s caregivers.
  • Help baby develop skills. Babies this age learn through relationships and by playing and exploring. Babies learn best when we give them a little help when then need it so they don’t become too frustrated. Share his joy in the things that interest him.
  • Help babies feel safe and secure. When we cuddle, rock, sing, read and talk to our baby, we send her the message that she is special and loved. Even when babies cry, it’s important to be affectionate. This teaches children that they are loved for who they are. It helps them develop a sense of trust that will help them learn to soothe themselves as they grow.
  • Make your culture part of the daily routine. Consistent routines also help babies feel safe and confident. A child’s culture is an important part of who they are. Find books and music at the library that relate to your culture and make these stories and songs part of your baby’s routine. Building connections to culture supports children’s self-esteem in healthy ways.
  • Understand and manage separation anxiety. Usually around 8 or 9 months old, some babies may start to show separation anxiety and become upset at being away from you. This is because babies this age are starting to develop “object permanence,” the understanding that things and people still exist even when you can’t see them. Click here to learn more about how to ease your baby’s separation anxiety.

Source: Zero to Three,

Look at an object in her hand, mouth it, and then take it out to look at it again. Expose kids to a variety of sensory experiences like sights, sounds, tastes, textures, movements, and smells, both indoors and outdoors.
Hold head, roll from back to stomach and from stomach to back.

Sit without support or move from a sitting position onto hands and knees.

Provide opportunities for them to move and engage in a variety of physical activities, such as lying on a blanket on the floor in a safe area.
Cry when hearing another baby cry or stop playing and look at a child who is crying. Talk about what other children are feeling or expressing with their sounds, gestures, or facial expressions.
Repeat sounds when babbling, such as “dadadada” or “babababa.” Respond to the baby’s cooing and babbling and converse as if the baby understands everything you are saying. Imitate sounds or gestures that the baby makes and allow time for the baby to imitate you.
Respond to a wave by waving and saying, “bye-bye.” Use everyday routines, such as leaving, to role-play social language games, like waving goodbye or blowing kisses.
Shake a toy, hear the sound it makes and then shake it again.

Bang a spoon on the table, notice the loud sound it makes and then do it again.

Offer toys that they can grasp and explore and see a response. Shake sound toys so they can hear the noises they make and react. Respond to the baby, pointing out the effects of their actions on toys. For example, say, “Look how you made the ball move!”

Source: Colorado Early Learning & Development Guidelines,

Many children with developmental delays or behavior concerns are not identified as early as they could be. As a result, these children have to wait to get the help they need to succeed in social and educational settings (in school, at home, and in the community).

It’s important to identify children with developmental delays or behavior concerns as early as possible. Research shows that early intervention and treatment greatly improves healthy development.

What is it? 

Keeping your eyes out for developmental milestones

Who does it? 

Parents, grandparents, other caregivers

When does it happen? 

Birth through 5 years old

Why is it important?  

  • To celebrate a child’s development
  • To talk about your child’s progress with child care and health providers
  • To identify any concerns early


Get free, simple-to-use checklists here.

What is it? 

Looking for specific developmental milestones

Who does it? 

Pediatrician, early childhood educator, other professional

When does it happen? 

At 9, 18, 24 and 30 months – or whenever there is a concern

Why is it important?  

  • To find out if your child needs more support with development
  • To decide if a developmental evaluation is needed


Professionals use a formal validated screening tool; learn more here.

What is it? 

Identifying and diagnosing developmental delays or conditions

Who does it? 

Pediatrician, child psychologist or trained provider

When does it happen? 

Whenever there is a concern

Why is it important?  

  • To find out if a child needs treatment, and/or
  • Qualifies for early intervention


Professionals do a detailed examination using formal assessment tools, observation and conversations with parents and caregivers.

Source: Centers for Disease Control and Prevention,

Learn more on the Developmental Screenings FAQ page.

Babies 4-8 months old are developing a sense of trust and security with parents and caregivers. They enjoy interacting face-to-face and are becoming more alert and mobile. Babies this age are comforted when they know what to expect in their daily routine.

They are developing a greater social and emotional understanding and often show more interest in other children. They start to show an awareness of feelings and emotional expressions in others. They are learning how to get — and keep — an adult’s attention.

Try these tips to build a baby’s resiliency skills at 4-8  months:

  • Respond to baby kindly and warmly every time you interact
  • Make eye contact with baby during routines like feeding and diapering
  • Talk and coo with baby, imitate his sounds and expressions
  • Play peek-a-boo
  • Talk, read and sing to baby every day
  • Let baby watch other children; let older children talk, smile and laugh with baby
  • Talk to baby about what he might be feeling based on behavior (crying, laughing, etc.)
  • Stick to a routine schedule for feeding, sleeping and other activities so baby learns what to expect

Source: Colorado Project LAUNCH,

The architecture of the human brain is constructed over time. The process begins before birth and continues into adulthood.

Early experiences and relationships shape how our brain gets built. Secure and loving relationships create a strong foundation for healthy brain development.

Depending on our experiences and relationships in the early years, our brains will establish either a sturdy or a fragile foundation, which impacts us for the rest of our lives.


Early brain development occurs through an essential process called “serve and return,” or the back-and-forth interaction between young children and adults.

5 Steps for Brain-Building Serve and Return

Learn more about brain-building serve and return in this video.


Sources: Center on the Developing Child at Harvard University,;  Zero to Three,

Get tips to support the social-emotional development of babies age 4 to 8 months!

(downloadable PDF resource)

Strong social-emotional skills are part of the foundation for lifelong mental health. As adults it’s our job to help children learn!


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