Pipe tip 21 swirl wheels; add tip 16 zigzag axle to front wheels. Trace birthday cake pattern with toothpick; ice smooth. Pipe tip 2A outline trailer base above back wheels. For cake, pipe tip 3 frosting; add tip 4 ball bottom borders, tip 7 outline candles and tip 16 pull-out flames; print tip 2 message. Pipe tip 7 shirt on conductor; pipe tip 2A ball head; pipe tip 7 hat. Add tip 3 stripes on shirt, hat and brim; pipe tip 3 dot hand. Add tip 2 mouth, dot eyes, nose, cheeks and ears. Pipe tip 16 shell bottom border, except on track side. Sprinkle rainbow jimmies around "cake"; insert balloons in smokestack.
*Note: Combine Lemon Yellow and Golden Yellow for shade used; combine Red-Red and No-Taste Red for shade used.