The research area of toddlers focuses on the cognitive, social, emotional, and physical development of children between the ages of one and three years old. Researchers in this field study various aspects of toddlerhood, such as language acquisition, motor skills development, social interaction, and emotional regulation. They also explore how early experiences and interventions can impact a child's development during this critical stage of life. Overall, research in this area aims to better understand and support the healthy growth and development of toddlers.