Each group needs:

• Styrofoam block, approximately 17 cm x 30 cm (6.6 inch x 11.8)
• 20 pipe cleaners 
• 40-50 small pom-pom balls, 1.3 cm (0.5 in)
• 10 large pom-pom balls, 5 cm (2.0 inch)
• 10 rubber bands
• yarn, 2 m (6.5 ft or more)
• aluminum foil, 50 cm x 27 cm (19 in. x 11 in.)
• masking tape, 1 roll
• container or tray to hold and organize group materials
• scissors
• cups (for holding a volume of pom-poms that will be “spilled” on to their designs) 0.5 L (18 oz.)
• Designing Polymers to Clean Water Worksheet (one per student)