Children's car tracks with inertial cars

 

— starting with the help of an inertial mechanism installed in the machine itself. Such a mechanism, in fact, is an accumulator of kinetic energy; Such a battery is usually "charged" by pulling the car back, after which it is enough to let it go — and the inertial mechanism will give the car a powerful push, allowing it to go through the entire track on the move. The inertial principle of operation is found mainly in stunt tracks (see "Track shape").