Thames & Kosmos Ignition Series Physics Simple Machines

700001 Features: -Establish a foundation in physics by building models.-Assemble and use a spring scale machines change the direction and magnitude of forces, making work easier to do.-Ages 8 and up. Includes: -Includes six simple machines: levers, pulleys, inclined planes, screws, wedges, and wheels and axles.-12-page color instruction book included. Assembly Instructions: -Assembly required. Dimensions: -Guide book dimensions: 3.25'' W x 9.5'' D.