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1.3: Who are infants and toddlers?

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    woman in black scoop neck shirt

    Who are Infants and Toddlers?

    The agreed upon age for infants and toddlers is birth to the day that they turn three years old, yet there is some debate within this about who is an infant and who is a toddler?

    Infants are generally agreed upon as being birth to around 1 year old (12 months), however the starting age of toddlerhood is anywhere from 12 months to 15 months old. The Center for Disease Control and Prevention (CDC) defines toddlers as beginning at 12 months old, while some pediatricians view toddlers as being only 12 months to 24 months (1-2 years). The DCFS licensing handbook puts toddler classrooms beginning at 15 months in Illinois, while some in their definition include 4 year olds as toddlers.

    As we are following Illinois DCFS guidelines, we will consider toddlers for this book to be 15 months-when they turn 3 years old. While sections of this book may blend/blur the ages of toddlers, generally speaking we will consider toddlers to be within this age range.

    Illinois DCFS Regulation for Child Care Centers

    Each classroom in Illinois has a requirement for how many adults and children are in the classroom together, referred to as ratios. Ratios are the minimum number of required adults in the classroom per a specific number of children. Additionally, each classroom in Illinois has a max number of children that can be in the classroom. While classroom sizes may be lower based on the dimensions of the classroom, the max number of children does not go up when the classrooms are larger. 

    In Illinois, the DCFS licensing requirement follows these ratios and classroom sizes for infants and toddlers:

      6 weeks-15 months 15 months-2 years 2-3 years
    Ratio (Teacher:Child) 1:4 1:5 1:8
    Classroom Size (max number of children) 12 15 16

    When there is a mixed age group, the ratio/classroom size will always be based on the youngest child. For example, if you have a 14 month old with a 16 month old, the ratio will be based on the age of the younger child (in this case, the 14 month old), creating the ratio of 1:4 with a max classroom size of 12. 


    1.3: Who are infants and toddlers? is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by LibreTexts.