👉 Toddler is a type of child that has not yet reached the stage of adolescence. It is often defined as being between the ages of 1 and 3 years old, with the majority of Toddler children having a growth spurt in their first year. In the context of language, "Toddler" can also refer to a person who is under the age of 5 or someone who has not yet reached the stage of adolescence.