Yep! If you have the corner guide rail course set you can stick them on the cardboard cut-outs that come with that set or you can print them out on thick paper or labels, that you then stick on thick cardboard, and add themto your origional set. If you have the set they basically function to keep the cars from going off course on the corners etc.. If you are designing your own track then you could just use them as track decoration on your corners etc.. add a little customization to your home-made track.
cheers..
