Extensive collection of experiments illustrating fundamental principles of physics. Demonstrations on this disc: Conservation of Angular Momentum - marbles and funnel, train on a circular track, tail wags dog, rotating stool with weights, rotating stool and long bar, rotating stool and bicycle wheel, gyroscopic stability, wheel and brake, satellite derotator; Precession - bike wheel precession, gyroscope with adjustable weights, bike wheel on gimbals, double bike wheel, motorized gyroscope; Rotational Phenomena - static / dynamic balance, football spin, tippy top, ship stabilizer, spinning rod and hoop on wire, stable and unstable axes of rotation; Gravitation - sections of a cone, ellipse drawing board, Cavendish balance. Kit contains: DVD with English and Spanish audio tracks and subtitles, and bilingual study guide.