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Virtual Idea Hub: Propellers and Pinwheels
Build and test a mini wind turbine, pinwheel, or decorative wind spinner. On a plane, a motor-powered propeller spins to push air. On a wind turbine, a rotor spins when pushed by air. How do the number, shape, and position of the propeller or rotor blades affect the rate of spinning? Experiment and find out!

Materials:
- Electric fan (or a breezy day outdoors)
- Cardboard
- Boxboard (thin cardboard)
- Scissors
- Tape
- Brads (a.k.a. brass fasteners; if not available, can substitute pencil, straw, or toothpick)
- Wooden barbecue skewers (optional)
- Markers or colored pencils (optional)
- Scraps of fabric, trash bags, or other flexible materials (optional)
- Bendable wire or pipe cleaners (optional)
- Hot glue (optional; adult supervision recommended)

Mar 3, 2022 04:00 PM in Eastern Time (US and Canada)

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