Two cubes feature 12 detailed drawings of key bones (skull, rib cage, pelvis, humerus, radius, ulna, femur, fibula, tibia, foot, hand and spinal column), and the other 2 cubes are labeled with the names of these bones. Students roll the cubes, point to the corresponding bones on their own body, state a bone fact, match the bone to its name or roll and compare and contrast the bones shown. Soft - foam cubes wipe clean and are quiet when rolled. Activity Guide with bone facts included. Cubes measure 1 5/8".