Our students investigated and classified different kinds of materials by their observable properties, including color and texture. They learned about states of matter and properties of materials including insulators and conductors through an experiment using hand warmers and thermometers. In the design problem, Angelina, Mylo, and Suzi, are challenged to keep ice pops cold during a soccer game – without a cooler. We applied our knowledge and skills to determine the best material to solve this design problem.