Learn the Signs. Act Early.

For Families

As they grow, children are always learning new things. CDC has developed tools and information to help you keep track of your child’s development and get help if you’re concerned.

Developmental Milestones

Read more about the milestones children reach in how they play, learn, speak, act, and move (crawling, walking, etc.) from birth through 5 years old.

CDC’s Milestone Tracker App

Track your child’s milestones with CDC’s FREE Milestone Tracker App, now available for iOS and Android. Interactive checklists with photos and video examples of developmental milestones help you know what to look for in your child.

Read more about the Milestone Tracker App

Where is Bear? – A Terrific Tale for 2-Year-Olds

Where is Bear?” is a terrific tale for 2-year-old children and their parents! This interactive book encourages children to help Tiger and his forest friends in their search to find Bear.

Read more about Where is Bear


Read Amazing Me — It’s Busy Being 3!

In Amazing Me — It’s Busy Being 3! Joey, a 3-year-old kangaroo, shows what he can do in one AMAZING day. This children’s book teaches parents developmental milestones as they read to their young child.

Read more about Amazing Me


Milestones in Action – a FREE library of photos and videos of developmental milestones

See photo and video examples of important developmental milestones that children should reach from 2 months to 5 years of age.

Visit Milestones in Action

If You’re Concerned

Don’t wait. Share your concern with your child’s doctor, and follow up with either Birth to 3 (for children 0-3 years old) or Child Find through your local school district (for children 3 years and older).

Learn more about what to do if you’re concerned about your child’s development.

Positive Parenting Tips

Visit the Positive Parenting website for tips on positive parenting and child safety by age, from birth through 17 years old.