Little Actions. Big Impact!

All the tools you need to help your child learn and grow

from PA Promise in partnership with OCDEL

Developmental Milestones Checklist: What changes should you expect as your child grows?

This milestone chart can help you check your child's development against common milestones.


Three and a half years

preschool boy playing with legos

Growing independence. Children at this age are starting to do more by themselves, including some parts of getting dressed and simple household chores. At the same time, they're starting to understand more words and ideas.

Check the box on each line that mentions at least two activities your child is doing, then click Tell me more.

Tell me more!

Concerned about your child’s development?

Call Pennsylvania’s CONNECT Helpline at 1-800-692-7288 for information about your child’s development and connecting to Early Intervention services in Pennsylvania.

Call Child Care Works Helpline at 1-877-4-PA-KIDS (1-877-472-5437) for information about finding, paying for and other concerns related to child care.

Learn more about these Helplines