Kiddipedia
Milestone charts, comparison graphics and “is my baby behind?” searches have become a defining feature of modern parenting. Here, pediatric physical therapist and Child Development Expert Dr. Maral Amani explains what milestones actually measure, why they’re so often misread as deadlines, and why the small, overlooked steps in between, known as “inchstones,” may tell us more about a child’s progress than the big ones ever could.
A Generation With More Information Than Ever
Parents today have more access to parenting information than any generation before them. At any moment, a quick scroll can surface dozens of experts weighing in on sleep, feeding, language development, tummy time and sensory play. That access is empowering, but it can also be overwhelming.
Developmental milestones have become one of the biggest parenting trends precisely because they offer something parents naturally want: a way to check whether their child is developing as expected. Social media has amplified that instinct, turning milestone ages into shareable graphics and easy comparison points. Should my baby be rolling by now? Is crawling really necessary? Why isn’t my toddler pointing yet? These are valid questions, but milestones are frequently misunderstood as strict deadlines rather than the flexible guideposts they were designed to be.
What Milestones Actually Measure
Milestones are based on research, and they represent averages or ranges, not an exact age every child “should” reach a skill. Some milestone charts report the age at which 50% of children achieve a skill, while others, including the milestones used by the U.S. Centers for Disease Control and Prevention, mark the age at which roughly 75% of children have reached it. That range reflects just how much natural variation exists in child development.
Understanding that milestones are statistical ranges, not deadlines, is one of the simplest ways parents can ease the pressure they put on themselves and on their children.
Comparing Your Child to Themselves, Not to a Chart
As both a parent and a pediatric physical therapist, I understand how difficult it can be not to compare your child to others. My own son had feeding difficulties in his first six months, and my social media feed quickly filled with content on that exact topic. It was a reminder that comparison is almost impossible to avoid once an algorithm knows what you’re worried about.
One of the most useful lessons I’ve learned, both personally and professionally, is that every child develops on their own timeline. Comparing your child to themselves, the progress they’ve made this month versus last month, is almost always more meaningful than comparing them to another child, or to a chart.
Development Isn’t a Checklist
Development doesn’t unfold as a simple sequence of roll, sit, crawl, stand, walk. Each milestone is built on hundreds of smaller experiences and skills that come before it. A baby’s first steps depend on months of building strength, balance, coordination and confidence. First words grow out of countless babbles, gestures, conversations and social exchanges. These foundational experiences quietly build the brain architecture that allows the bigger, more visible milestones to emerge.
Meet the “Inchstones”
This understanding has given rise to a concept that’s gaining traction among parents and therapists alike: inchstones. Unlike milestones, inchstones celebrate the smaller achievements that happen in between the major developmental landmarks. An inchstone might be:
- Transferring a toy from one hand to the other
- Reaching across the midline of the body
- Consistently responding to their own name
- Beginning to use an emerging pincer grasp
These small moments rarely get their own milestone chart, but they’re often the building blocks that make the bigger milestones possible. As therapists, we regularly look for these “mini milestones” because they show us that development is progressing, even before a child reaches the next major one. A child who doesn’t seem to be hitting their milestones on schedule may still be showing slow, steady progress at the inchstone level, and that progress matters.
Play Is the Engine Behind It All
Play drives this entire developmental process. Every time a child explores their environment, solves a problem, stacks a block, crawls toward a toy or shares a book with a caregiver, they’re strengthening multiple areas of development at once.
One of the most useful frameworks here is Lev Vygotsky’s Zone of Proximal Development, the idea that children learn best when an activity is just challenging enough to encourage growth, without tipping into frustration. Meeting a child in that “just right” zone allows development to unfold naturally, while quietly building their confidence along the way.
The Takeaway for Parents
Developmental milestones deserve the attention they get, because they help caregivers recognise when a child is progressing as expected, and when additional support might help. But they should never become a source of unnecessary stress or comparison.
When we shift our focus from racing toward the next milestone to noticing the inchstones, the playful moments and the steady progress happening in between, we get a much fuller picture of a child’s development. The milestone might be the destination, but it’s the thousands of small experiences, interactions and discoveries along the way that truly shape a child’s growth.
About the Author
Dr. Maral Amani, PT, DPT, is a Child Development Expert at Lovevery, the early childhood brand known for transforming the way children play and learn through research-backed guidance. She is a licensed pediatric doctor of physical therapy, certified in early intervention to support infants and toddlers through their holistic development, and works as an early intervention pediatric physical therapist providing in-home support to families. Her passion is educating parents on supporting their child’s development through play and connection.
