Child-development knowledge

Which parts of development matter from birth to age 5?

Begin with your child's current age, an ability you care about, or a question from everyday family life. Age is a reference; Growth Paths help explain change.

By age

Begin with important foundations for this age

Explore a four-domain picture, Milestone references, what to notice, and interactions you can try in everyday life.

undefinedAt 2 months, your baby is beginning to take a more active part in the world through their gaze, sounds, and body movements. Start with foundational MiundefinedAt 4 months, your baby may be more eager to lift their head, reach toward things, and answer familiar people with sounds. This stage is not only aboutundefinedAt 6 months, your baby may reach, shift their body, explore objects, and enjoy familiar backandforth exchanges with greater purpose. Movement, attentiundefinedAt 9 months, your baby is gaining more ways to move independently, handle objects, and communicate an intention. Whether or not crawling has appeared,undefinedAt 12 months, your baby is using movement, object play, imitation, and communication for more real purposes. Independent walking is only one part of tundefinedAt 15 months, many children are moving from cruising toward independent walking and from gestures toward a small set of everyday words. Different abilundefinedAt 18 months, your child takes part in daily life through walking, handling objects, imitation, and a growing set of words. Variation can be wide at tundefinedAt 2 years (24 months), your child is beginning to combine movement, words, imagination, and social observation. Rather than only counting words or acundefinedAt 2½ years (30 months), your child can connect more life experience across pretend play, negotiation, expression, and problemsolving. An adult's roleundefinedAt 3 years (36 months), your child increasingly uses language, movement, and imagination to do things with other people. Wholechild development at thiundefinedAt 4 years (48 months), your child can use more complete plans, language, and cooperation to carry out something they enjoy. Development is visible noundefinedAt 5 years (60 months), your child is preparing for more independent learning and group life. The most useful question is whether they can bring movem

By ability

Browse 31 sub-domain Growth Paths

Follow how skills change from birth to age 5, understand a child's current position, and find useful interaction priorities.

By question

Begin with a specific family question

Find the situation, a direct answer, what to notice, and interactions you can try.

Learning to Walk at 12–15 Months: How to Support Each Next StepLearning to walk does not begin from the same place at 12 and 15 months. Around 12 months, many children are moving from crawling toward pulling to stFrom Gestures to First Words at 15–18 MonthsWhen your child communicates mostly by looking, pointing, pulling your hand, or making sounds, begin by showing that you understand. Put one useful woHow to Read With an 18-Month-Old Who Keeps Turning the PagesRepeatedly turning pages or returning to the same picture does not necessarily mean your toddler is “just flipping.” Follow the page they choose and mToddler Tantrums After Hearing “No”: How to Hold the Limit and HelpWhen your child cries after a reasonable limit, do not rush into a longer explanation or reverse the limit simply to stop the crying. Name what they wHow to Read English Picture Books With a 3-Year-OldFor a child beginning English, choose a book with a simple event, repeated language, and pictures that make the meaning visible. You do not need to trHow to Introduce English to a 3-Year-OldFor families introducing English as an additional language, you do not need to begin with a large collection of songs, flashcards, and books. Choose tWhen Two Toddlers Play Separately: How to Help Them ConnectTwo children playing separately does not mean the playdate has failed. Let them become familiar with the space and materials, and wait to see whetherPlaydates at 2½–3: Helping Toddlers Practice Playing With PeersPlaydates at 2½ to 3 are not about rehearsing a perfect social script. They give children repeated, lowpressure chances to join, respond, handle smallSorting at 2½: Help Your Child Find the Feature That MattersSorting at 2½ does not need to mean putting every red object in a red bin. Give the objects a real purpose: animals of different sizes need houses thaEarly Math at 2½: Make Quantity, Space, and Sorting UsefulEarly math at 2½ does not need to begin with worksheets or equations. Start with three kinds of relationships that change what your child does: quantiTeach Quantity at 2½ by Making “How Many” MatterTo explore quantity at 2½, let “how many” change the result of a real task. If the order is for two grapes, load them one at a time. Say one count worHow to Help a 2½-Year-Old Understand Stories Without QuizzingShared reading at 2½ does not need to begin with a stream of questions or a request to retell the book. Start with one picture and name clearly who isFrom Counting to “How Many” at Age 4Reciting number words is not the same as matching one count word to each object and understanding that the final number tells how many are in the wholMy 9-Month-Old Isn't Crawling Yet. How Can I Encourage Movement?If your baby already looks, reaches, kicks, turns, or pushes toward something they want, you do not need to place them in a “perfect” crawling positio