The Forces & Simple Machines Kit contains a variety of custom made and unique components, including a Force Board, Inclined Plane, and Vector Board. Also included is a complete set of accessories needed for 15 different activities, including an 11 piece weight set, spring scales, pulleys, levers, support base and rod, and much more. We have also included a comprehensive lab activities manual (over 80 pages) and a CD containing a slide presentation of all experiments that can be performed.