Preschooler

What It Means

A preschooler is a child between 3 and 5 years old. The CDC uses that age band for its preschool parenting advice and publishes milestone checklists at 3, 4 and 5 years. It describes these as years of growing independence, when children explore, ask about the world around them and pay more attention to adults and other children outside the family.

How Parents Say It

• "She starts preschool in the fall."
• "He asks why about everything now."
• "Four-year-olds have an opinion on every single thing."

The Breakdown

What the CDC says for ages 3 to 5

Using the checklists. Each one lists what most children can do by that birthday. Go through it a few weeks before a checkup and note anything your child isn't doing yet, so you have specifics to share.

When to talk to the doctor

• Your child isn't doing one or more things on the checklist for their age.
• They've lost a skill they once had.
• A preschool teacher or caregiver has raised a concern, or you have one of your own.

The CDC's advice in each case is to act early: talk with your child's doctor, share what you've seen, and ask about a developmental screening.

Good to Know

NHTSA says a child should stay in a rear-facing seat until reaching its top height or weight limit, then ride forward-facing in a seat with a harness and tether until that seat's limits are reached. After that comes a booster seat, still in the back seat. Check the height and weight limits printed on your child's current seat to know when the next stage is due. The CDC also offers a free program, Essentials for Parenting ToddlersToddlerA child from 1 to 3 years old, the stage CDC's parenting guidance places between infancy and the preschool years. See more and Preschoolers, written for parents of children aged 2 to 4. On screens, the 1 hour figure is CDC's. The AAP replaced its 2016 media statements in February 2026 with a new policy statement, "Digital Ecosystems, Children, and Adolescents," which puts more weight on the quality and setting of what children watch, and on talking about it as a family, than on minutes alone.

Related Terms and Categories

• Toddler

  A child from 1 to 3 years old, the stage CDC's parenting guidance places between infancy and the preschool years.

• Developmental milestones

  Skills most children can do by a certain age, like rolling over or waving bye-bye. CDC places each at the age 75% or more of children reach it.

• Kindergarten readiness

  How prepared a child is for kindergarten, in social, emotional, language, thinking and physical skills, alongside meeting their state's entry age.

• Pre-K

  Prekindergarten: school-readiness classes for children, typically 3 and 4 years old, in the year or two before they start kindergarten.

• Screen time

  The time a child spends using screens such as TVs, tablets, phones, computers and game consoles, counted across a day or a week.

Baby and toddler