My nephew's 4th birthday cake consisted of a yellow cake cut into a number 4 shape. I used buttercream icing to cover the cake. I then cut out white fondant squares to create the checkerboard pattern on the sides and dark grey fondant to cover the top only. I coated it lightly with silver shimmer dust to give it the true road look. A set of generic toy race cars made a great accessory and nice take home gift for my nephew's guests.