STAY UP TO DATE. Join our email list »

First Things First First Things First Menu Close

Ages & Stages

Ages and Stages

While all children develop differently, it helps to know if they are meeting typical milestones and how you can support their healthy development and learning.

Your Child @

Below are materials to help you understand what’s happening at different stages of your child’s life and how you can help nurture their growth and development. All have been reviewed and approved by the American Academy of Pediatrics.

infant stages header

Your Child @ Birth
Your Child @ 2 Months
Your Child @ 4 to 6 Months
Your Child @ 6 to 9 Months
Your Child @ 9 to 12 Months

Toddlers stages header

Your Child @ 12 to 18 Months
Your Child @ 18 to 24 Months
Your Child @ 24 to 36 Months

preschooler stages header

Your Child @ 3 Years
Your Child @ 4 Years
Your Child @ 5 Years



Arizona’s Infant and Toddler Developmental Guidelines

First Things First and other key partners in Arizona’s early childhood system developed this detailed resource to help parents, families and other caregivers understand the appropriate development of children from birth to age 3, and also what they can do to support children’s healthy development and learning.

Recognizing that all children progress differently, these guidelines describe expectations about what infants and toddlers should know (understand) and do (competencies and skills) across the full range of development:

  • Social and emotional development, which includes trust, self-regulation, and relationships with other children
  • Approaches to learning, which includes persistence, curiosity, creativity, and problem solving
  • Language development and communication, which includes listening and understanding, speaking, and literacy
  • Cognitive development, which includes exploration, memory, and play
  • Physical and motor development

The guidelines also explain what adults can do to support children’s optimal learning and development. For example:

example of adult guidelines

Download the Guidelines

More Online Resources About Child Development

  • – the skills and behaviors you can expect from your baby at every stage from birth to 3
  • – more on developmental stages from the American Academy of Pediatrics
  • – developmental milestones checklists from the Centers for Disease Control and Prevention
  • – a child development tracker for insights on the stages of growth, from PBS Parents

Latest News More News

Oral Health

Taking a bite out of school absences

Miss Indian Arizona recognized as Champion for Young Children

volunteer champions

First Things First honors 2018 Champions for Young Children throughout Arizona

Stay Up To Date.

Join our email list to keep up with the latest news and information from FTF

Send me:

© First Things First. All Rights Reserved. • Privacy PolicyWebsite FeedbackOmbudsman-Citizens Aide