Not a bad idea Zamperla, will have to keep it in mind. I actually got a bit of spring wire from one of the Dodgem guys when they were in Rocky a few years ago to give it that authentic look. The sparkler would certainly give it that wow factor,come to think of it, so would an incense stick with fire crackers tied around it at about 2cm gaps. Not that I HAVE any fireworks as they are illegal in Queensland!
Would sure cover the smell of the gas fumes from the petrol engine- the incense I mean- not that there's anything wrong with the smell of freshly exploded fire crackers in my view.
Roman candles are great. I've had many a silly moment bobbing up and down holding one on my head, while it shoots out coloured rockets (even funnier on another part of the body, but this is a family site so I won't elaborate)