Can you generate electricity using nothing but your own hands? Discover the power of mechanical engineering as you assemble a working hand-cranked generator! Explore how gears transfer motion, how mechanical energy becomes electrical energy, and how engineers use these principles to power everyday technology. Put your creation to the test as you experiment with gear speed, electrical output, and energy efficiency. BUILD IT → TEST IT → CHANGE IT → EXPLAIN IT! No batteries required, just engineering, experimentation, and a little muscle power! All materials provided.