Each group should have:

• 2-3 index cards or construction paper
• clear packaging tape
• scissors
• a variety of filter-making supplies (i.e., pipe cleaners, cotton balls, cloth, tape, tissue paper, etc.)
• 2-3 copies of the Cleaning the Air Worksheet (one per student)

For the classroom to share:

• shoebox
• tape
• string
• aluminum foil
• 4 index cards
• black pepper, sand or similar small particles
• large container (such as a trash can or cardboard box)
• protractor
• hair dryer