For use with NGSS standard MS-PS4-2 and Missouri Learning Standard 6-8-PS4-2. Use the provided instructions to create a mystery cube with canning wax and aluminum foil. Students will use the provided lab handout to complete an inquiry lab using the mystery cubes. The lab activities guide students to determine their own procedures to collect qualitative data. Students will use the data to infer what materials the cube is made from. Students will apply vocabulary including transmit, absorb, transparent, translucent and opaque to classify materials. Answer keys are included which can be used for concept introduction or guided notes.