Play is one of the primary occupations of childhood. Through play, children develop a sense of their place in the world, how the world and objects in it work, and how to navigate complex social interactions. Delays in any area of development directly impact a child’s ability to play. This can be due to impaired motor skills, poor social skills, cognitive impairment, or language delays. The Developmental Milestones Guide provides a reference for the normal development of play skills, as well as milestones in the areas of fine and gross motor, sensory processing, visual perception, self care and others that impact play.