Despite the many benefits of play, within primary school, play is often reduced to lunch breaks, particularly as children move to higher grades. Loose parts play affords children opportunities to develop imagination and 21st-century skills (collaboration, communication, creativity and critical thinking). As part of a larger project, two Year 4 classes in an Australian primary school (two teachers and 46 children, aged 9-10 years) engaged in one hour of structured or unstructured loose parts play during class time for eight weeks using a Nüdel Kart (loose parts play cart). Children in the structured play group were set challenges and taught creative attitudes and processes. Data was collected through children's surveys and focus groups and teacher interviews. Children and teachers were overwhelmingly positive about the play sessions. Children enjoyed the opportunities for construction, social skills and creativity, while teachers focused on inclusion and social skills. Future classroom practice recommendations include integrating both play types and meeting creativity and social and emotional curriculum requirements through loose parts play.