Milestone Checker
Developmental milestones are skills most children (about 75% or more) show by a given age. Pick your child's age, check what you see them do, and we'll explain what it means and what to do next. Based on the CDC's "Learn the Signs. Act Early." checklists.
Important: this is not a diagnosis — it is a screening aid. If a milestone is missing, or if your child has lost skills at any age, the right move is always the same and it's free: ask for an evaluation. Acting early helps; waiting doesn't.
Source: CDC Developmental Milestones (cdc.gov/act-early). Free "Milestone Tracker" app and full checklists are on the CDC site. Under 3: state early-intervention contacts at cdc.gov/FindEI. Age 3+: your school district's Child Find office.