Involving Parents

Infant-toddler-preschooler: Childcare age groups and development phases

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Nupur Mittal
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10 min read
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As parents, your top priority is giving your children the best start in life. From birth until they enter school, your child progresses through multiple childcare age groups and development phases. Each stage—spanning the infant, toddler, and preschooler age range—brings unique challenges, growth opportunities, and experiences.

That’s why it’s essential to understand the different daycare age ranges and groups, key developmental milestones, and how to support them effectively. This knowledge equips you to provide tailored care and select caregivers or programs that align with your child’s specific childcare age, ensuring they thrive at every step.

Why Childcare Age Groups Matter for Your Child’s Growth

Children across various daycare ages develop distinct skills, have unique needs, and require specialized attention within child care programs. For instance, an infant in the 0-18 month day care age range is just beginning to explore language skills—like cooing and babbling—while a preschooler in the 3-5 year preschooler age group starts building social connections beyond the family.

These differences highlight why care must adapt to each day care age group. Whether you’re a parent wondering how old kids are in daycare, a caregiver, or a teacher, knowing what each stage demands is a must.

Licensed child care ensures quality and safety by adhering to minimum standards, undergoing regular inspections, and maintaining specific staff-to-child ratios and group sizes. This framework supports children across all ages for daycare, from what age is considered infant for daycare (typically birth to 18 months) to school-aged kids, giving parents confidence in their child’s environment.

Benefits of Understanding Childcare Ages

  • With a strong grasp of childcare ages, you can foster positive growth by delivering care that matches your child’s developmental stage.
  • You can plan age-appropriate activities suited to each daycare age—what captivates an infant won’t always engage a toddler or preschooler.
  • You’ll build strong relationships by connecting with your child through the needs tied to their day care age.

Useful Read: How to Engage in Developmentally Appropriate Practice in Childhood

Exploring Childcare Age Groups: Developments and Best Practices

Let’s break down the four primary daycare age groups—infant, toddler, preschooler, and school-age. Each section details the developments to expect, practical ways to nurture them, and the ideal child-to-adult ratios for daycare rooms by age.

1. Infant/Newborn Age Group

Age Range: 0 – 18 months

Developments Expected

Infants master physical milestones like sitting, crawling, and early walking. They begin language development with cooing, babbling, and simple sounds like “ma-ma.”

They also form bonds of love and trust with parents and caregivers, while responding to social cues and recognizing familiar faces.

How to Care for This Daycare Age

  • Limit time in strollers, swings, or bouncer seats to encourage movement. Try tummy time on a soft mat to build neck and core strength.
  • Stay on top of vaccination schedules—crucial for this early childcare age to prevent later illnesses like measles or whooping cough.
  • Create a safe, nurturing, and responsive environment where infants can explore. For example, hang a colorful mobile to stimulate visual tracking or offer a rattle for grasping practice. Family child care offers a cozy, home-like option for this age range for daycare.
  • Ensure infants (0-12 months) get 12–16 hours of adequate sleep per 24 hours, including naps—essential for this day care age group. A consistent bedtime routine, like a gentle lullaby or dim lighting, can ease them into rest.

Ratios and Group Size

Ideal: 1 trained adult to care for 3-4 infants.

2. Toddler Age Group

Age Range: 18 months – 3 years

Developments Expected

By age 2, toddlers become more mobile and aware of their surroundings. Between 18 months and 2 years, they show curiosity about new objects and people.

They start imitating adults and peers and recognizing themselves in mirrors. Past age 2, these milestones—like learning, social skills, and thinking—grow more prominent, aiding navigation of their world.

How to Care for This Day Care Age Range

  • Spark curiosity with field trips, long walks, or bus rides, introducing them to everyday sights like trees, birds, or vehicles—point out a fire truck’s red color to boost vocabulary. Child care centers provide structured settings ideal for this toddler vs. preschool transition.
  • Be patient with shifting food preferences—offer variety gently, like sliced fruits or bite-sized veggies, rather than scolding. Informal child care, such as care provided by friends or relatives, can offer a more flexible approach to meeting a toddler's changing needs.
  • Ensure 11–14 hours of sleep per 24 hours, including naps, to fuel this active age group for toddlers. A short story or soft music can signal naptime, calming their busy minds.

Ratios and Group Size

Ideal: 1 trained adult to care for 3-5 toddlers (some settings stretch to 6-10, but lower ratios suit this age group the best).


3. Preschooler Age Group

Age Range: 3 – 5 years

Developments Expected

Preschoolers grow more independent and connect with adults and kids outside the family. They experience major cognitive developments like writing letters and numbers, developing humor, and solving puzzles.

Physical skills emerge too, such as riding a bicycle, dressing themselves, or singing songs and poems.

How to Care for This Preschooler Age Range

  • Promote play and peer conversations to teach teamwork, sharing, and friendship—try a group game like “Simon Says” to build social skills. Preschool programs excel at supporting this day care age group.
  • Instill discipline by correcting mistakes early—gently redirect if they grab a toy, explaining turn-taking. This is key in mixed daycare classroom age groups where ratios matter.
  • Offer nutrient-rich foods—veggies, fruits, protein, and vitamins—like carrot sticks or yogurt, while avoiding excess fat, sugar, or salt.
  • Aim for 10-13 hours of sleep per 24 hours, including naps, to energize this preschooler age group. A quiet wind-down with a picture book works wonders.

Ratios and Group Size

Ideal: 1 trained adult to care for 6-10 preschoolers.

4. School-Age Children

Age Range: 6 – 12 years

Developments Expected

A strong sense of independence emerges, with friendships taking center stage. A heightened need for peer recognition peaks in this day care age group.

How to Care for This Daycare Age

  • Celebrate accomplishments to boost confidence—praise their science project or a good report card. Encourage at least 1 hour of daily physical activity—kickball or a nature hike keeps them active.
  • Teach road safety basics for safe exploration, like looking both ways before crossing, as they gain freedom. Involve them in team and volunteering events to instill social values—think a group cleanup or sports team. School-age programs or family child care providers often support this age range for daycare.
  • Ensure 9-12 hours of sleep per 24 hours to recharge this active group—a consistent bedtime helps them wind down after busy days.

Ratios and Group Size

Ideal: 1 trained adult to care for 10-12 school-aged kids.

Here’s a tabular representation to give you a bird’s eye view of four different age groups and developments during each stage.

Name Age Range Ideal Child-to-Adult Ratio Developments Observed Activities to Promote These Developments
Infant 0-18 months 1 trained adult to care for 3-4 infants Develop a bond of love and trust with parents.
Language development includes sounds like cooing, babbling, and uttering words like ‘ma-ma’ and ‘da-da’.
Sing and read to your baby.
Talk to your baby using motherese (baby talk).
Interact them with colorful toys to encourage their motor skills.
Toddler 18 months - 3 years 1 trained adult to care for 3-6 toddlers Imitate adults and other children.
Recognize themselves in the mirror.
Use puzzles and encourage the toddler to assemble them.
Play outside and encourage physical activities such as jumping and walking.
Sing songs and read books during sleeptime.
Preschooler 3-5 years 1 trained adult to care for 6-10 preschoolers Demand more independence as they interact with adults and children outside their families.
Learn to ride a bicycle and dress or undress.
Plan guided movements such as rope skipping and hopscotch.
Draw with them and indulge in thumb painting, hand painting, etc.
School-aged 6-12 years 1 trained adult to care for 10-12 school-aged kids Develop critical thinking skills.
Engage in group activities and teamwork.
Encourage group projects and collaborative games.
Introduce them to various sports and creative activities.

Learn and care for each age group with Illumine

With a clear understanding of development milestones across these childcare ages, you can provide the best care tailored to your child’s daycare age. Who wouldn’t want that?

Thankfully, you don’t have to tackle it alone—illumine, a leading childcare management software, steps in to help. It’s especially effective in primary caregiver home settings or daycare rooms by age, ensuring seamless management and communication for parents and providers alike.

Caregivers benefit too, with tools to track milestones and streamline daily tasks, making it easier to support each child’s growth.

1. Get instant reporting from the daycare center:

Our daycare reporting tool lets schools and daycare providers connect with parents and send them real-time updates about their children. From their activity status to the daily progress report, parents can get a holistic view at their fingertips.

2. Smart bus tracking

Keep track of the driver’s details, the bus route, and even track location with an in-built GPS. Besides, you’ll get alerts about your children’s arrival and departure timings. So, you don’t need to wait an hour before waiting for the bus with illumine’s bus tracking feature.

3. Streamline your children’s learning process.

As children start going to school, the workload can increase tremendously. The work can be overwhelming, from tracking your child’s progress to managing different lessons. But, with illumine’s lesson planning software, everything is managed in a single dashboard. You get a bird’s eye view of your child’s progress, school assessment, and even achievements.

Child's assessment report in illumine linked with development milestone for her age group

Final Thoughts

There’s no denying that children need evolving care as they transition through different daycare ages. Preschoolers and school-age children, in particular, demand extra attention as they explore the world, connect with diverse peers and adults, sharpen skills, and seek independence.

Picture a busy morning: your preschooler proudly ties their shoes for the first time, while your school-ager debates which friend to invite over. It’s moments like these that make you wonder which stages benefit most from day care support. The answer lies in understanding these unique needs and adapting accordingly.

Managing these day care age groups can feel overwhelming, but illumine’s tools make it manageable. From reporting to lesson planning and assessments, it streamlines processes for schools and providers, ensuring your child thrives as they navigate the infant-toddler-preschool journey.

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