Each group needs:

• cylindrical block of wood, at least 1 inch (2.54 cm) in diameter and about 8 inches (20 cm) long
• Water Turbine Worksheet

For the entire class to share:

• 1 or 2 multimeters or voltmeters
• 2 double-ended alligator clip wire test leads
• 1-2 DC hobby motors (available at RadioShack [suggested part numbers: 273-223, 273-047 or 273-106] or hobby stores; make sure the shaft does not have a gear on it)
• drill
• drill bit with a size equal to the diameter shaft of the hobby motor
• two blocks of 2 x 4 wood, each about 5 inches (12.7 cm) long
• two 2.5-inch (6.35 cm) nails or screws
• hammer or screwdriver
• one 3-5-inch (7.6-12.7 cm) piece of PVC pipe with an interior diameter that is slightly larger than the diameter of the blocks of cylindrical wood used for turbine construction
• various materials from which turbine blades can be constructed, such as index cards, plastic bottles, paper or plastic cups, cardboard, particle board, thick poster board, foam board, thin dowel rods, bamboo skewers, etc.
• scissors
• glue
• strong tape, such as duct tape or packing tape
• water
• pitcher, plastic bottles or cups to hold and pour water (the more the better)