This updated edition of the popular Thames & Kosmos Physics Discovery Science Kit brings all the materials and building parts to learn about forces and simple machines. With this science and engineering toy you build 12 mechanical models, that demonstrate fundamental ideas in mechanical physics. For example, you can build a balance scale to learn about lever arms, a freight elevator to learn about pulleys, and a bicycle to learn about wheels. Construct a spinning motion picture machine to learn about centripetal and centrifugal forces, and a geared transmission to learn about gears. Build a simple spring scale to measure the forces acting on your models and an inclined plane to learn about normal force and gravitational force. Make a water wheel powered crane and a catapult to learn about the transfer of energy. Finally, put your physics knowledge to the test by building a sailing land yacht and a rubber band powered dragster. The Physics Discovery Science Kit New Edition includes 48-page illustrated instructions for the building projects and science experiments. Educational Toys Planet's Physics Discovery Science Kit uses parts that are compatible with all of Thames & Kosmos Physics and Construction kits.