Each group needs:

• model ear canal (see attachment on how to assemble)
• 1½'' clay pot (available at crafts stores)
• 1½'' PVC pipe connector (available at hardware stores)
• plastic tubing ½'' outer diameter, 3/8'' inner diameter (available at hardware stores)
• o-ring to fit over ½" plastic tubing (such as Danco #8, available at hardware stores)
• vegetable bag from grocery store (only 2 or 3 are needed per class)

For the entire class to share. (You may not need all items; most are available from crafts or drug stores)

• small pebbles (required)
• popcorn kernels (required)
• clay
• glue dots
• scissors
• pipe cleaners
• rubber bands
• glue (rubber cement, hot glue, Elmer's glue)
• dowel rods (big and little)/small sticks
• miniature clothes pins
• paper clips
• wire
• small fuzzy pom poms, or other small fuzzy object
• tape
• tweezers
• magnets
• oral syringes (available at drug stores)
• any other classroom items or small item that could be included in the invention