In this activity on page 2 of the PDF, learners test different materials to find out which is the best insulator. Learners use aluminum foil, newspaper, plastic wrap, and wax paper to insulate ice cubes and compare the melting rate of each ice cube. Use this activity to introduce learners to heat transfer (conduction) and insulation materials. Safety notes: Adult supervision required. Do not eat or drink any of the materials in this activity. Follow Milli's safety tips, which are listed on the left hand side of page 2.