This is a fun project to help students see how the integral formulas produce volumes of known cross sections! I usually do two examples with the class and then divide the students into groups of 3-5. Each group will need a base on foam board (either f(x) or g(x) below), ONE shape of multiple sizes, scissors, and pins. You can break the tasks for the groups as follows: cutting shapes, placing shapes, and calculating volume (with calculator). When they are finished, students can put their answers