Build a cut and glue paper wind turbine model.
Build a furnace with a fresnel lens that can melt copper enamel.
Build a model skin on frame kayak and learn about indigenous cultures of the arctic.
Build a sailwind windmill with cloth blades.
Build a parabolic focusing collector for heating water.
This activity reviews the kinds of solar collectors, including: water heating collectors, air heating collectors, and more sophisticated systems using mirrors, lenses and even photovoltaic solar cells.
Build a verticle savonius rotor windmill.
Build a model pelton wheel water power turbine.
Sand casting is an amazingly versatile technique that works well with pewter.
