These iconic Montessori prisms are designed to help children understand the concept of volume and the relationship between different dimensions. The set of five yellow prisms, varying in size, allows kids to explore and compare volumes through hands-on manipulation. Perfect for building spatial awareness and foundational math skills in a tactile and engaging way! Perfect for both classroom and home learning environments. "Made by plywood,beechwood" "25.4*15.5*12.8cm"