This edition of Early Childhood Folio contains articles to inform, provoke and challenge early childhood practitioners. An exploration of the early childhood curriculum questions whether the way it is being enacted leaves sufficient room for debate and uncertainty and for practices that promote diversity and innovation. There are research findings on how early childhood teachers support children’s scientific learning, children’s strategies for joining in play, and lessons on how teachers can co-construct games of chase. One article based on close observation of children’s social interactions poses the question: at what point would you intervene? Another explores the experiences of same-gender families in early childhood settings.