Click on an age group
to learn more about development at that age

birth to 6 months

6 to 12 months

12 to 24 months

24 to 36 months

3 year olds

4 year olds

5 years & older

Pathways Awareness
Child Development
Milestones

PBS Parents
Developmental
Tracker

Zero to Three
National Center for Infants
Toddlers & Parents

Born Learning
Learning In
Natural Environments