TWO(2) GREAT Hands-On, Self-Directed, Authentic Calculating DENSITY ACTIVITIES in ONE! (Actually it's 2 + 5 FREE extras) First--The Density of Small Objects LAB is a simple, but complete, way to have students practice with HANDS-ON Density Calculations! Simply place an assortment of small objects--broken crayons, shells, rocks, glass marbles, bolts, or other such items that will fit into your 100mL graduated cylinders-for students to choose from and then, they can solve for their Irregular Volu