This chapter explores the extension of metacognitive processes beyond the individual mind into the material world. It challenges the traditional view of metacognition as solely internal mental operations, proposing instead a framework of systemic metacognition that incorporates the role of objects and environments in monitoring, controlling, and facilitating cognitive processes. I introduce the concept of hylomentation—the skills require to think with and through material—and argue for its importance in understanding creative cognition and metacognition. Drawing on research from various disciplines, including cognitive science, anthropology, and creativity studies, the chapter demonstrates how physical artifacts can scaffold metacognitive processes, offering stability for externalizing thoughts and dynamism for feedback and exploration. Recognizing the metacognitive potential of things necessitates a reconsideration of cognitive skills, particularly those involved in coupling mind and environment. By reframing metacognition as a distributed process that includes material engagement, this work opens new avenues for research and offers a more comprehensive understanding of human thinking and creativity in real-world contexts.