Development · 2 months to 5 years
Milestone Checker
Notice everyday skills and prepare questions for your child’s healthcare provider.
A starting point for a conversation
Choose an age to explore four selected examples adapted from CDC guidance. This is a small selection, not the complete CDC checklist or a developmental screening tool. Use the full checklist linked for each age alongside conversations with your child’s provider. Sources
Your selections stay in this tab while it is open. Nothing you select is sent to us or saved between visits. Download your notes before leaving or refreshing.
Start with an age group
You can mark what you have observed, choose questions to ask, and print or download a conversation sheet.
Selected examples
For each example, choose what you have observed. You can leave any response blank.
Read CDC’s full checklistYour conversation notes
Read your notes
Go to the source
CDC’s complete milestone checklists
The examples above are paraphrased from the age-specific CDC pages below. Each full checklist covers more skills than this tool. Source content checked November 5, 2026.
For the research behind first-year milestones, read our guide to how communication develops in the first year.
About CDC’s developmental milestones · Our editorial standards