Skills such as taking a first step, smiling for the first time, and waving “bye bye” are called developmental milestones. Children reach milestones in how they play, learn, speak, act, and move (crawling, walking, etc.).

Click on the age of your child to see the milestones:

• 2 months
• 4 months
• 6 months
• 9 months
• 1 year
• 18 months
• 2 years
• 3 years
• 4 years
• 5 years
• Print the milestone checklists (PDF) pdf icon[2 MB, 20 Pages, 508]
• Download the Milestone Tracker mobile app
• View the Milestones in Action  photo and video library

“Learn the signs. Act early.” materials are not a substitute for standardized, validated developmental screening tools pdf icon[918 KB, 115 Pages, Print Only].

Quiz

Video on Milestones

Learn how to look for developmental milestones and what to do if you’re worried about your child’s development or think there’s a problem.

Watch the video »

Child Development: It’s Better to Know (in Spanish)external icon

Learn why it is important to recognize developmental milestones and what to do if you have concerns about your child’s development.

Watch this Spanish language video »external icon