Abstract
Play is important to children's learning. When young children have interrupted time to playfully and independently explore, discover, investigate and experiment in stimulating, safe and varied environments, critical thinking and scientific inquiry are promoted. Notably, facilitating on-the-spot observations related to the 'nature of science' during play provides diverse opportunities to support children to construct scientific knowledge as a process of inquiry. This chapter describes the importance of play in early childhood and the 'nature of science' in the early years. This is followed by four case studies that highlight how studying scientific phenomena can be facilitated through play. Each case study describes the context of the children's play and how the educator/teacher expands on this to encourage their scientific explorations and thinking. The development of the case studies occurred in a school inspired Reggio Emilia educational philosophy.