Extensive collection of experiments illustrating fundamental principles of physics. Demonstrations on this disc: Statics - force board, clothesline, load on removable incline, pulley advantage, pulley and scales, simple machines, levers, horizontal boom, arm model, torque bar, hinge board, torque wrench, torque wheel, balancing meter stick, meter stick on fingers, bridge and truck, Roberval balance, ladder forces, broom stand, bed of nails, egg crusher. Kit contains: DVD with English and Spanish audio tracks and subtitles, and bilingual study guide.