Keys make cars go it39s the first thing we all learn about the finer mechanics of motoring take this sound observation entirely literally and have a go at launching these burnin39 key cars just slot the diecast car 15101 onto the key and then press the button to launch it across the room down the hall or under the nearest inconveniently placed sofa there are several different designs available but they all zip off the end of the key fob with the same amount of power and synthetic