Milestones & Development
Age-by-age development timelines for motor, language, social, and cognitive milestones.
15 articles
Cognitive Development in Babies: How Your Baby's Brain Is Growing
Explore how a baby's brain develops from birth to 24 months — key cognitive milestones, what drives brain growth, and how parents support it every day.
Baby Teething: Symptoms, Timeline, and How to Help
Teething usually starts between 4 and 7 months. Learn the timeline, which symptoms are actually caused by teething (and which aren't), and safe ways to help a teething baby.
Early Intervention: What It Is and How to Access It for Your Child
Early intervention provides speech, occupational, and physical therapy for children under 3. Learn what it covers, how to access it, and why earlier is better.
Sensory Processing in Toddlers: Signs, Systems, and What Helps
Learn about the 8 sensory systems, how toddlers with SPD may present, and when occupational therapy can help — with practical home strategies.
Signs of Developmental Delay: When to Talk to Your Pediatrician
Missing a milestone doesn't always mean a delay — but some patterns need attention. Learn the red flags for developmental delay in babies and toddlers, and what to do if you're concerned.
Motor Skill Development in Toddlers: What's Normal at 12, 18, 24 Months
Understand gross and fine motor milestones for toddlers at 12, 18, and 24 months — what to expect, how to support development, and when to ask for help.
Toddler Social Development: Milestones, Play Stages, and When to Seek Help
Understand toddler social development from parallel play to cooperative play, what milestones to expect at 12, 18, 24, and 36 months, and red flags worth addressing.
Tummy Time for Babies: Why It Matters and How to Do It
Tummy time builds the strength babies need to roll, sit, crawl, and walk. Learn when to start, how long to do it, and why babies who hate it still need it.
When Do Babies Sit Up? Average Age and How to Help Them
Most babies sit independently between 6 and 8 months. Learn the stages of sitting development, what you can do to help, and when delayed sitting is worth discussing with your pediatrician.
When Do Babies Start Talking? Language Milestones 0–24 Months
Most babies say their first word around 12 months and use 50+ words by 24 months. Here are the language milestones for 0–24 months and the signs of late talking.
When Do Babies Start Walking? Average Age and Red Flags for Late Walking
Most babies take their first steps between 9–12 months and walk well by 14–15 months. Learn what's normal, how to help, and when late walking warrants a doctor visit.
Potty Training: Average Age, Signs of Readiness, and How to Start
Most children are ready for potty training between 18 and 36 months. Learn the readiness signs to look for, the approaches that work, and what to do when progress stalls.
Wonder Weeks: What the Science Actually Says About Mental Leaps
The Wonder Weeks book claims babies go through 10 predictable 'mental leaps.' Here's what the evidence actually supports, what's oversimplified, and what is genuinely useful.
When Do Babies Roll Over? Signs They're Ready + What to Do If They're Late
Find out when babies typically roll over, the signs they're almost there, how to help with tummy time, and when late rolling might be worth mentioning to your doctor.
Baby Developmental Milestones Chart: Month by Month (0–24 Months)
A complete baby developmental milestones chart from birth to 24 months — covering motor, language, social, and cognitive development with red flags and when to seek help.