An amazing scientific kit to discover the principles of mechanics and engineering and to run at full speed with two police car models. It contains over than 300 components to be assembled, two electric motors for rear wheel drive and front steering wheel, gears and a transmission unit. Connecting the cars to the radio frequency receiver children can drive the cars via remote control and start breathtaking car chases. The illustrated manuals and the free special app will guide children step by step in the building of the models.