Levers and Linkages are one of the simplest Machines we use in our every day life without even realizing it. There is almost no machine that does not use some form of Levers, and this package teaches it all! Learn how Levers are used to increase force and lift heavy objects, how the direction of motion can be changed and how links are used to connect moving parts. Interesting models such as the Pantograph, Gates, Scales, Mechanical arms, lifting platforms and much more may be created from the parts contained in this box. Detailed instructions for 14 models are included.