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Relational GeoSolids are the perfect tool for discovering the relationships among shape, size, and volume. Use these solids to demonstrate and visually illustrate the connection between two and three dimensional solids.A GeoSolid set contains 14 clear plastic geometric shapes. Each shape is hollow and features a removable stopper so it can be filled with rice, sand, dry fill or water to demonstrate the relationship between volume and size. Shapes include: sphere, cone, cubes, prisms, cylinders, pyramids and hemisphere. Each set also includes an activity guide. Kit includes 10 sets. Educational products, manipulatives, and kits incorporate applied math and science principles into classroom and homeschool-based projects. Teachers in pre-K, elementary, and secondary classrooms use educational kits, products, and manipulatives alongside math, science, literacy, and STEM curriculum to demonstrate concepts and real-world applications through hands-on activities.