How does a balloon drive or a bending rod drive work? What is the difference between a friction drive and a rubber-band drive. How can wind be used as a drive? This set provides a glimpse into how different types of drives work. The brawny off-road vehicle with functioning steering and suspension can also be combined perfectly with the Motor Set XM and Control Set for remote control ability. The instructional teaching and activity guide provides a great deal of interesting information on the principles behind the models.