A toddler is a child approximately 12 to 36 months old, though definitions vary. The toddler years are a time of great cognitive, emotional and social development. The word is derived from "to toddle", which means to walk unsteadily, like a child of this age.

What age is a toddler?

Toddlers (1-2 years of age)

Is 4 years old a toddler?

Toddlers may be considered children that range from 1 year to 4 years of age, though others may have different definitions of these terms. There's no official definition of the upper limit of toddlerhood.