The brain is rapidly building connections in the early years
The Center on the Developing Child explains that more than one million new neural connections form every second during the first few years after birth. Simpler connections and skills form first, followed by more complex circuits; early connections provide a foundation for later learning, behavior, and health.
This does not mean that development closes after age 3. The brain can form new connections throughout life, and many complex abilities continue to develop. The early years matter because connection-building is especially active—not because parents must teach more and faster within a vanishing window.
What is serve and return?
A child's “serve” can be small: looking toward an object, babbling, reaching, frowning, pointing, asking a question, or bringing you something they discovered. An adult's “return” does not require a complex lesson. You might follow the child's gaze, answer a sound, name what they are attending to, wait for the next response, or offer a little help when it is needed.
A typical back-and-forth interaction includes:
- Notice what your child is focused on or communicating.
- Respond with your gaze, words, facial expression, movement, or a hug.
- Name what your child is seeing, doing, or feeling.
- Give your child time to respond and let turns continue.
- Notice when your child wants to stop, then wait for the next beginning.
The core is not continuous adult input. It is a real exchange between two people.
Why do games and everyday moments matter?
Simple play can give children practice with attention, memory, waiting, controlling movement, communicating, and solving problems. For babies and young children, these opportunities do not need a classroom. Peekaboo, passing an object back and forth, putting things away together, or responding to a discovery during a walk can all become age-appropriate practice.
An activity's value is also not limited to whether the child completes a standard result. Initiating, trying, changing an approach, responding to an adult, or needing a little less help than before are all processes a parent can intentionally notice.
How Better Parenting uses these scientific ideas
Better Parenting organizes child development into four domains—Movement, Cognitive, Social/Emotional, and Language—and 31 sub-domains, then designs parent–child activities around specific abilities. Each activity explains:
- how to begin;
- how a parent can observe, wait, respond, demonstrate, or adjust support;
- which behavior is most useful to notice;
- how the activity may support the related ability.
Parents can also tell Better Parenting what they observed during the interaction and in daily life. The app places that information in the relevant sub-domain to help a family understand current development and a meaningful next step. This is Better Parenting's product method. It does not mean that Harvard research has directly validated Better Parenting's individual results.
What the science does not mean
- It does not mean that every activity produces immediate, measurable progress.
- It does not mean that longer interaction or more teaching is always better.
- It does not mean that an adult should control the play until the child completes an answer.
- It does not mean that parents determine every developmental outcome.
- It does not mean that parent–child activities replace pediatric care, medical diagnosis, or professional assessment.
Development reflects maturation, genes, experience, relationships, health, environment, and other factors together. Better Parenting helps parents turn everyday interaction into better opportunities to observe and support. It does not promise a certain outcome from one activity.
Key sources
- Brain Architecture: how early neural connections, brain architecture, and experience relate;
- Serve and Return: the definition and developmental importance of responsive, back-and-forth interaction;
- 5 Steps for Brain-Building Serve and Return: five practical steps for parents and caregivers;
- Young Children Develop in an Environment of Relationships: a working paper on relationships and development;
- Brain-Building Through Play: age-based play ideas that support executive function.
Begin with one back-and-forth interaction
You do not need to prepare a lesson. Choose something that fits your child's age and interest, notice how they begin, and respond.