Hi There, The Micro sets are what are sometimes called H0 or HO size. There is no agreement on the exact scale but they range from 1/87 to 1/60. Nevertheless the upshot is that you can use pretty much any accessories meant for H0 scale trains with the set, for example buildings, signs, billboards etc I don't where you are located but the H0 scale slot car scene is much bigger in North America than in Europe or Asia. In general, an brand slot car will work on the Micro set that is the same scale, however as with any scale, the magnetic force, tires, motors are all different and perform very differently.