Every child is unique. No two children develop, grow, and learn at exactly the same pace. Yet children generally develop in predictable ways. Below are links to lists of developmental milestones by age. Babies and toddlers are growing, learning and changing all the time. It’s fun to watch! We suggest you take notes and keep track of the new things they do and the milestones they reach.
Services to support young children who may have developmental delays are different depending on their age. There are two age groups:
- Developmental Milestones for Children Birth to 2 Years Old
- Developmental Milestones for Children 3 to 5 Years Old
The CDC has created a developmental milestones mobile app with incredibly helpful tools and resource information for parents. Download the CDC’s Developmental Milestones App here.
Developmental Milestones for Children Birth to 2 years old
2 Months
4 Months
6 Months
9 Months
12 Months
15 Months
18 Months
2 Years
2.5 Years
Developmental Delays
If you notice that your child under the age of three is not meeting some of their developmental milestones, we recommend contacting Arizona Early Intervention Program (AzEIP) for an evaluation. Your child may benefit from services and therapies designed to help improve their development.
Next Step:
Arizona Early Intervention Program (AzEIP)
Developmental Milestones for Children 3 to 5 Years Old
3 Years
4 Years
5 Years
Children from age 3 to age 5 who have developmental delays receive services from their local school district through their preschool program.