The kit includes a 27-inch demonstration board with a laminated scale to show three different road serfaces and a 1:24 scale cast metal model car constructed to allow you to demonstrate the following. - Pitch, roll and yaw axis - Loss of traction to the rear wheels and all four wheels - The road grip for the best driving surface, a worn driving surface, an ice surface and with sand on the roadway - The road grip with good tires and worn tires *The window of oppurtunity occurs * The difference in performance while within the traction envelope and when well over the traction envelope Each set contains a booklet of activities in which correct actions are demonstrated.