Milestones by Age
Every baby develops at their own pace. These guides show what's typical at each age, when to talk to your doctor, and what you can do this week to support your child.
2 months
What your 2-month-old should be doing: smiling, tracking objects, head control, and communication milestones. Plus red flags to watch for and simple activities to try.
View milestones
3 months
What your 3-month-old should be doing: pushing up on arms, cooing, tracking objects, and social smiles. Plus warning signs and fun activities to support development.
View milestones
4 months
What your 4-month-old should be doing: rolling over, laughing, reaching, and better head control. Plus red flags to watch for and simple activities to try this week.
View milestones
5 months
What your 5-month-old should be doing: sitting with support, reaching and grabbing, teething signs, and object awareness. Plus activities to support healthy development.
View milestones
6 months
What your 6-month-old should be doing: movement, language, social, and feeding milestones, red flags to watch for, and activities to try this week.
View milestones
7 months
What your 7-month-old should be doing: sitting independently, crawling, babbling, and showing stranger anxiety. Plus red flags and fun activities to try.
View milestones
9 months
What your 9-month-old should be doing: pulling to stand, pointing, waving, and using the pincer grasp. Plus developmental red flags and activities to try this week.
View milestones
12 months
Explore 12 month old milestones including first steps, words, and social skills. Expert-backed guide with activities and red flags for one-year-olds.
View milestones
15 months
Discover 15 month old milestones including confident walking, expanding vocabulary, and growing independence. Expert guide with activities and developmental red flags.
View milestones
18 months
Explore 18 month old milestones including running, 10-20 words, pretend play, and growing independence. Expert guide with activities, feeding tips, and red flags.
View milestones
2 years
Discover 2 year old milestones including 2-word sentences, running, jumping, and imaginative play. Expert guide with activities, potty training tips, and developmental red flags.
View milestones
30 months
Track your 30-month-old's development: 200+ words, short conversations, jumping with both feet, drawing lines, and rich pretend play.
View milestones
3 years
See what to expect at 3 years old: 4-word sentences, pedaling a tricycle, drawing circles, dressing with help, and playing cooperatively with friends.
View milestones
42 months
Track your 3.5-year-old's development: longer stories, hopping on one foot, drawing people, early scissor skills, and growing emotional awareness.
View milestones
4 years
See what to expect at 4 years old: telling long stories, drawing a person with 3+ parts, hopping, counting to 10, and rich pretend play with friends.
View milestones