A "toddler" is a young child who is just beginning to walk and is typically between the ages of one and three years old. This stage of development is characterized by rapid growth and learning, as toddlers explore their environment, develop basic language skills, and begin to assert their independence.
The word "toddler" comes from the verb "toddle," which means to walk unsteadily, like a young child learning to walk. The term "toddler" was first used in the early 20th century.