For demonstration (one time set-up/use):

• 1 large, clear jar (large mayonnaise or pickle jars with wide mouths work well)
• 1 white or light-colored, thin sponge (cut in half)
• 1 eyedropper
• Water
• Sand (enough to fill jar about 1/2 of the way)
• 2 cups gravel (enough for approximately a 1" layer)
• Red food coloring

For preparation of "contamination" (for all groups to share):

• 2-3 gallons of water
• ½ cup sugar
• ½ cup salt
• ¼ cup black pepper
• 1 cup white vinegar
• 1 cup baking soda
• 1/8 cup dish soap
• 30 medium-sized, transparent, plastic cups or beakers

Each group should have:

• 2 white carnations
• 2 6" strips of masking tape
• 1 index card (to be used in advance by the teacher)
• Scissors
• 2 different colors of food coloring (groups may share)
• Teaspoon and tablespoon measuring spoons (or have several of each for groups to share)
• 2 cups water
• 3 copies of the What's Gotten Into You? – Data Contamination Sheet