Dr. Montessori said that the hand is the instrument of the mind. What exactly does this mean? This talk explores the foundational role of motor development as the basis for cognitive development and learning. We discuss ways to recognize delays in development in the infant and toddler population, along with discussion of the key role of early intervention in supporting children to become their best selves. We also discuss when and how to talk to parents and/or refer a child for more formal assessment.