Made of durable plastic each hollow solid features a removable base and stopper for use with any dry or liquid fill. Jumbo solids are relational in size each measuring 10cm (4") in height to better demonstrate the properties of the solids and the parallels involving shape volume and surface area. Activity guide included. NEW additions to this set include a rectangular pyramid and large rectangular prism that are relational to the small and large cubes and small rectangular prism greatly expanding the ability to compare similarities and fractional relationships. Solids Included: Small Cube Large Cube Small Rectangular Prism Large Rectangular Prism Small Triangular Prism Large Triangular Prism Hexagonal Prism Square Pyramid Rectangular Pyramid Triangular Pyramid Hexagonal Pyramid Small Cylinder Large Cylinder Cone Sphere Hemisphere