This printable learning pack provides a hands-on introduction to Porifera (Sponge), the simplest of all multicellular animals. Designed for preschool, kindergarten, and Grades 1–3 students, this resource offers Montessori-inspired activities suitable for individual shelf work, learning centers, or small group lessons in homeschool and classroom settings. Use this resource with clear, true-to-life illustrations to help children understand the unique body structure, life cycle, and classification