In advance: Make drivers and race cars. Use fondant from Primary (green, red, yellow, blue) and Natural (black) Multi Packs. For gray, mix 1/2 oz. black fondant into 1 oz. white fondant (reserve 2 oz. white). Roll out fondant 1/8 in. thick unless otherwise specified. Assemble pieces in order using fondant adhesive. Let dry on waxed-paper covered boards.