Built by Kinedu. Studied by Stanford. Expected ages tested across 280 million answers.
3.5 million children. More than 280 million milestone answers. Enough real life to test expected ages, see which skills move together, and understand what changes over time.
One continuous story: an instrument made with caregivers, a developmental study, then a replication across the full Kinedu record.
Kinedu created the caregiver-report instrument and tested its initial psychometric properties with 2,135 Spanish-speaking caregivers. Michael C. Frank advised on the early revision of its 0–24-month milestone items.
Stanford researchers Benjamin Stenhaug, Nilam Ram, and Michael C. Frank analyzed 177,934 Kinedu observations from 21,861 children to study how developmental dimensions change together over time.
Kinedu compared its expected ages with approximately 280.6 million in-scope milestone answers from 3.5 million children.
Not “is this okay?” What are we seeing—and what could come next?
Expected ages in the assessment closely matched the observed pattern across Kinedu’s large dataset.
A clearer way to prepare for what may be next.Early motor, language, cognitive, and social-emotional observations move together before they become more distinct.
The whole picture matters more than one answer alone.Early assessment results do not determine a child’s later rate of progress. Development keeps unfolding.
Come back for new context—not a permanent label.No training in early childhood development, no clinic visit, no equipment. Every question is written so that anyone who cares for a child can answer it, just by watching. Low cost, no frills — literally for everyone.
The expertise lives in the instrument, so it doesn’t have to live in you.A skill’s window isn’t just when it appears — it’s when it’s actively being built. Some skills are stepping stones that get replaced by something more advanced. Others, once gained, stay. The assessment knows the difference, and stops asking about what a child has already moved past.
Babbling builds early — half of children by 5 months. As children move toward first words, the assessment shifts its attention from babbling to early speech.
Share of children showing each skill, by age · Kinedu record, 2020–2023 · shaded band ±1 SD across the skill’s milestonesHalf of children by 19 months, three quarters by 29 — and once gained, never handed off. The wide range is real: children reach it at genuinely different ages.
Share of children showing the skill, by age · Kinedu record, 2020–2023A new way to see your child: what you’re noticing, what it means in context, and where it sits in the sequence of development.
Which skills are consolidating, which are just beginning, and the developmental age your child is showing.
See the skills that may be opening up, so play, conversation, and everyday routines can meet your child where they are.
Use a calm, concrete summary with another caregiver or your child’s pediatrician when that conversation would help.
Kinedu’s Developmental Model shows, with data, five features of how children develop during the early years.
Early on, every domain moves with every other one.
One thing enables the next. The order does not change.
The sequence is universal. The pace is individual.
Some periods are especially receptive. They narrow. They do not close.
No model can tell you how one specific child will unfold.
The five features are drawn from Kinedu’s parent guide to early development — and from Big Bang Baby, the book behind the model, soon to be released.
Kinedu is a developmental check-in for everyday observation and practical support. It gives context; it does not replace a conversation with a qualified professional.
The research lives underneath the experience. The next step still begins with what you notice today.
Start the free assessment →