Each train car serves 2-3.
Bake and cool 4 mini loaf cakes. Cut 1 cake vertically in half. (Only 1 half-cake is used — enjoy the second as a snack!). Tint portions of buttercream icing red, blue, yellow and black.
Build cab by positioning half loaf cake, cut edge down, on top of 1 whole loaf cake. Outline and fill in window areas with tip 3 and black buttercream icing; smooth with finger dipped in cornstarch, if desired. Outline edges of engine cake with tip 18 in red Cover with tip 18 stars in blue buttercream. Position candy wafers for wheels. Cut licorice twists and position between wheels for axles. Cut a fruit slice horizontally in half; attach in front with dots of icing for cowcatcher. Position large spice drop on top for smokestack.
Cover 1 whole loaf cake with tip 18 stripes in red icing. Decorate edges with tip 18 yellow stars. Position candy wafers for wheels. Position assorted candies on top.
Cover the last whole loaf cake with tip 18 zigzags in yellow. Decorate edges with tip 18 blue zigzags. Position candy wafers for wheels. Position assorted candies on top.