An invitation to play, or play invitation, comes from a Reggio philosophy of teaching. It is a set of materials presented to preschoolers with no rules on how to use them. It is an arrangement of materials, random or collected, that invites preschoolers to explore and learn through play. Like process art, there is no intention of what the outcome should be. The value in activities like an invitation to play is in what happens while the preschoolers are playing, not after they are done.