For each group:

• paper to draw on
• colored pencils or crayons
• 1 freezer-strength, sealable, sandwich-size plastic bag
• 5-8 grains of white rice
• ½ cup prepared red gelatin
• paper towels
• attached worksheets (one per student)

For the entire class to share (optional):

• microscopes (as many as possible/available)
• blood cell slides (Note: Human blood smear slides can be ordered from Fisher Scientific for about $4 each. Go to: http://www.fishersci.com/ecomm/servlet/cmstatic?href=index.jsp&store=Scientific&segment=scientificStandard&&storeId=10652