The Sassy Pop Developmental Playmat offers gross motor skills develop from head to toe during the first year of life. From head and neck control, to sitting, crawling, and ultimately, walking. Fine motor skills develop in order of: limbs, hands, multiple fingers, and single fingers, ending in thumb and forefinger interaction. Motor skill development is related to mental development. Particularly in infancy, motor skills are a critical tool for learning about social and physical environments prior to the emergence of language skills.