I am making a Hot Wheels cake(s) this weekend and wanted to make a race track from one cake to the other which is on a 3 tier cake stand. But one of them I want to curl up and around, like a circle to the next cake up. Any ideas of what kind of mold I should use. I am very new at fondant so I am not sure what would work best. Alsohow many days in advance do I need to make something like that?