A 14 page research paper that explores the toddler years in early childhood development. The toddler years, roughly from 18 months to 3-year-olds, constitute a period of rapid social, emotional and cognitive growth in the life of a child. This discussion of childhood development during the toddler years focuses on how various models of personality development offer insight into childhood behavior during this period. Then, this information is applied to observations of specific toddlers, and this is followed by a discussion of implications of psychological theories of development, in regards to toddlers, from a Montessori perspective. Bibliography lists 6 sources.