Transparent, 3 - D plastic shapes get an update - bold, bright colors! This selection of common geometric shapes offers a concrete way to explore geometry, volume and other measurement concepts. Allows students to relate 2 - D shapes to 3 - D solids by examining and comparing the removable bases. Includes large triangular pyramid, square pyramid, hemisphere, sphere, cone, pentagonal prism, small cube, large cube, rectangular prism, triangular prism and cylinder. Fills with liquid or dry - fill for studies of volume, and cleans easily. Cleans easily. Durable plastic shapes measure 3 cm or 6 cm. Activity Guide includes formulas and intervention strategies.