With this Density Kit, various shapes are used to teach students how to make measurements in the Metric System and how to use the formula: Density = Mass/Volume. Students use the various materials to demonstrate densities. Includes one 3”x 1”x 1/4” aluminum bar, two 1/2” aluminum cubes, one steel sphere, one glass sphere, and one 15 cm scale. Grades 6+, Ages 11+. Buy in sets of 10 for your whole classroom and save!